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Artículos de revistas sobre el tema "Carboxylate salt"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 16 de febrero de 2022

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1

Rochon, F. D. y P. C. Kong. "Iodo-bridged complexes of platinum(II) and synthesis of cis mixed-amine platinum(II) compounds". Canadian Journal of Chemistry 64, n.º 9 (1 de septiembre de 1986): 1894–96. http://dx.doi.org/10.1139/v86-312.

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Iodo-bridged platinum(II) dimers, [Pt(L)I2]2 with ligands (L) containing nitrogen as the donor atom, have been synthesized from the reactions of cis-[Pt(L)2I2] with perchloric acid. The dimers can be cleaved in aqueous media by a second nitrogen ligand to produce isometrically pure cis-[Pt(L)(L′)I2].These compounds can finally be converted to the chloro or carboxylato compounds by precipitating the iodo ligands with a silver salt and adding KCl or a carboxylate salt. Several compounds of the types cis-[Pt(L)(L′)Cl2] and cis-[Pt(L)(L′)(dicarboxylate)] were thus prepared. A few dimers of the type [(L)(L′)Pt(tetra-carboxylate)Pt(L)(L′)] were also synthesized.

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2

Quinn, R. "ROOM TEMPERATURE MOLTEN CARBOXYLATE SALT HYDRATES". Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 31, n.º 3 (31 de marzo de 2001): 359–69. http://dx.doi.org/10.1081/sim-100002224.

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3

Smith, Graham. "Poly[μ3-aqua-aqua-μ5-(4-nitrobenzoato)-caesium]". Acta Crystallographica Section E Structure Reports Online 69, n.º 12 (16 de noviembre de 2013): m664—m665. http://dx.doi.org/10.1107/s1600536813030638.

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In the structure of the title complex, [Cs(C7H4NO2)(H2O)2]n, the caesium salt of 4-nitrobenzoic acid, the irregular CsO9coordination sphere comprises three bridging nitro O-atom donors, a bidentate carboxylateO,O′-chelate interaction, a triple-bridging water molecule and a monodentate water molecule. A three-dimensional framework polymer is generated, within which there are water–carboxylate O—H...O and water–water O—H...O hydrogen-bonding interactions.

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4

Sydora, O. L., R. T. Hart, N. A. Eckert, E. Martinez Baez, A. E. Clark y C. J. Benmore. "A homoleptic chromium(iii) carboxylate". Dalton Transactions 47, n.º 14 (2018): 4790–93. http://dx.doi.org/10.1039/c8dt00029h.

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The first homoleptic monomeric chromium(iii) carboxylate has been prepared using an anhydrous salt metathesis synthetic route. The carboxylate groups coordinate the chromium in a bidentate chelate yielding an aliphatic soluble complex.

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5

Ismailov, Ismail E., Ivaylo K. Ivanov y Valerij Ch Christov. "Trifunctionalized Allenes. Part IV. Cyclization Reactions of 4-Phosphorylated 5-Hydroxyhexa-2,3-dienoates". Letters in Organic Chemistry 17, n.º 9 (17 de septiembre de 2020): 726–33. http://dx.doi.org/10.2174/1570178617666200225104238.

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This manuscript focuses on the reactions of 4-phosphorylated 5-hydroxyhexa-2,3-dienoates with protected or unprotected hydroxy groups involving 5-endo-trig cyclizations. Reactions with electrophiles result in mixtures of the 2,5-dihydro-1,2-oxaphosphole-5-carboxylates and the 5-phosphorylfuran- 2(5H)-ones by competitive electrophilic cyclization due to the neighboring phosphonate (phosphine oxide) and the carboxylate groups participation. 4-Phosphorylated 5-hydroxyhexa-2,3-dienoates were smoothly transformed into the corresponding 4-phosphoryl-2,5-dihydrofuran-2-carboxylates by using 5 mol % of a silver salt as a catalyst in the 5-endo-trig cycloisomerization reaction.

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6

Janowski, WK y RH Prager. "The Chemistry of Phthalide-3-carboxylic Acid. III. Decarboxylation of Salts in the Presence of α,Β-Unsaturated Ketones". Australian Journal of Chemistry 38, n.º 6 (1985): 921. http://dx.doi.org/10.1071/ch9850921.

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Potassium phthalide-3-carboxylate (3-oxo-1,3-dihydroisobenzofuran-1- carboxylate ) decarboxylates readily in dimethyl sulfoxide at 145°, and the intermediate phthalidyl anion is efficiently trapped by α,β - unsaturated ketones. The major 1,4-addition product is accompanied by smaller amounts of an isomeric product formed by subsequent cyclization and rearrangement, and sometimes traces of a 1 : 2 1,4-addition product. The caesium salt gives slightly more cyclized product, and the lithium salt undergoes very slow decarboxylation. The synthetic usefulness of the salt decarboxylation is compared with that of the free acid.

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7

Martens, Sean J. y David K. Geiger. "Structural characterization of two tetrachloridozincate salts of 4-carboxy-1H-imidazol-3-ium: a salt hydrate and a co-crystal salt hydrate". Acta Crystallographica Section E Crystallographic Communications 73, n.º 2 (13 de enero de 2017): 162–67. http://dx.doi.org/10.1107/s2056989017000317.

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Imidazole-containing compounds exhibit a myriad of pharmacological activities. Two tetrachloridozincate salts of 4-carboxy-1H-imidazol-3-ium, ImHCO2H+, are reported. Bis(4-carboxy-1H-imidazol-3-ium) tetrachloridozincate monohydrate, (C4H5N2O2)2[ZnCl4]·H2O, (I), crystallizes as a monohydrate salt, while bis(4-carboxy-1H-imidazol-3-ium) tetrachloridozincate bis(1H-imidazol-3-ium-4-carboxylato) monohydrate, (C4H5N2O2)2[ZnCl4]·2C4H4N2O2·H2O, (II), is a co-crystal salt with six residues: two ImHCO2H+cations, two formula units of the zwitterionic 1H-imidazol-3-ium-4-carboxylate, ImHCO2, one tetrachloridozincate anion and one water molecule disordered over two sites in a 0.60 (4):0.40 (4) ratio. The geometric parameters of the ImHCO2H+and the ImHCO2moieties are the same within the standard uncertainties of the measurements. Both compounds exhibit extensive hydrogen bonding, including involvement of the tetrachloridozincate anion, resulting in interconnected chains of anions joined by water molecules.

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8

Zacharias, Savannah C., Gaëlle Ramon y Susan A. Bourne. "Supramolecular metallogels constructed from carboxylate gelators". Soft Matter 14, n.º 22 (2018): 4505–19. http://dx.doi.org/10.1039/c8sm00753e.

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9

Piątek, Piotr. "A selective chromogenic chemosensor for carboxylate salt recognition". Chemical Communications 47, n.º 16 (2011): 4745. http://dx.doi.org/10.1039/c0cc05537a.

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10

Revathi, Palanisamy, Janani S. Mohan, Thangavelu Balakrishnan, Kandasamy Ramamurthi y Subbiah Thamotharan. "Crystal structure and Hirshfeld surface analysis of poly[[di-μ3-glycine-lithium] perchlorate]". Acta Crystallographica Section E Crystallographic Communications 75, n.º 2 (4 de enero de 2019): 134–38. http://dx.doi.org/10.1107/s2056989018018145.

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In the title salt, {[Li(C2H5NO2)2]ClO4} n , the Li+ cation is coordinated by four carboxylate oxygen atoms of the glycine molecules with a distorted tetrahedral geometry. The glycine exists in a zwitterionic form with protonated amino and deprotonated carboxylate groups. In the crystalline state, the title salt is primarily stabilized by intermolecular N—H...O and Cα—H...O interactions which interconnect various units. Hirshfeld surface analysis indicates that the intermolecular H...O/O...H interactions are the most important contributors to the crystal packing.

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11

Noriko, Kasuga C., Kato Hiroshi, Kurihara Masafumi, Yumita Masanori y Yamaguchi Kazuo. "Dipotassium salt of a double-armed terephthalic acid derivative: dipotassium 2,5-bis(2-{2-[2-(2-{2-[2-(2-hydroxyethoxy)phenoxy]ethoxy}phenoxy)ethoxy]phenoxy}methyl)terephthalate methanol tetrasolvate". Acta Crystallographica Section E Structure Reports Online 63, n.º 3 (28 de febrero de 2007): m924—m926. http://dx.doi.org/10.1107/s1600536807008239.

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Single crystals of the the title compound, 2K+·C58H56O18 2−·4CH3OH, were obtained from a methanol solution. The anion is centrosymmetric; consequently the asymmetric unit contains one-half of the salt and two methanol molecules. Each polyether chain contains one K+, which is coordinated by eight O atoms belonging to the carboxylate, terminal hydroxy and six ether groups. The structure of the entire anion is such that the two K+ are enclosed in the shape of an S. One methanol molecule forms hydrogen bonds with the O atom of the carboxylate group that does not participate in the coordination. The other methanol molecule forms hydrogen bonds with the other O atom of the carboxylate group that coordinates with K+ and also with the terminal hydroxy group of an adjacent salt unit.

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12

Tani, Tahahiro, Kazuki Sada, Masatsugu Ayabe, Yuya Iwashita, Takanori Kishida, Michihiro Shirakawa, Norifumi Fujita y Seiji Shinkai. "X-ray Crystallographic Study of Alkylammonium Anthracene-9-carboxylates as a Model for Fibrous Structure of Binary Anthracene Salt Gels". Collection of Czechoslovak Chemical Communications 69, n.º 6 (2004): 1292–300. http://dx.doi.org/10.1135/cccc20041292.

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Crystal structure of hexylammonium anthracene-9-carboxylate was investigated. The salt was arranged by a one-dimensional hydrogen bond network to form a columnar structure in the crystalline state. This columnar structure should be the model of fibrous assemblies in the organogels of anthracene-9-carboxylate alkylammonium salts having a long alkyl chain.

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13

Smith, Graham. "Poly[μ-aqua-μ5-[2-(2,3,6-trichlorophenyl)acetato]-caesium]". Acta Crystallographica Section E Structure Reports Online 69, n.º 12 (6 de noviembre de 2013): m628. http://dx.doi.org/10.1107/s1600536813029395.

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In the structure of the title complex, [Cs(C8H4Cl3O2)(H2O)]n, the caesium salt of the commercial herbicide fenac [(2,3,6-trichlorophenyl)acetic acid], the irregular eight-coordination about Cs+comprises a bidentateO:Cl-chelate interaction involving a carboxylate-O atom and anortho-related ring-substituted Cl atom, which is also bridging, a triple-bridging carboxylate-O atom and a bridging water molecule. A two-dimensional polymer is generated, lying parallel to (100), within which there are water–carboxylate O—H...O hydrogen-bonding interactions.

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14

Mout, Rubul, Gulen Yesilbag Tonga, Moumita Ray, Daniel F. Moyano, Yuqing Xing y Vincent M. Rotello. "Environmentally responsive histidine–carboxylate zipper formation between proteins and nanoparticles". Nanoscale 6, n.º 15 (2014): 8873–77. http://dx.doi.org/10.1039/c4nr02097a.

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15

Li, Bin, Ting Sang, Lizhong He, Jin Sun, Juan Li y Shirong Guo. "Exogenous Spermidine Inhibits Ethylene Production in Leaves of Cucumber Seedlings under NaCl Stress". Journal of the American Society for Horticultural Science 138, n.º 2 (marzo de 2013): 108–13. http://dx.doi.org/10.21273/jashs.138.2.108.

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To examine whether 1 mm of spermidine (Spd) modifies plant ethylene production in response to short-term salt stress, cucumber (Cucumis sativus) seedlings were grown in nutrient solution with or without 75 mm NaCl stress for 3 days, and the leaves were sprayed with 1 mm Spd or water (control). We investigate the effects of the treatments on ethylene production, 1-aminocyclopropane-1-carboxylate (ACC) content, 1-(malonylamino) cycolpvopane-1-carboxylic acid (MACC) content, activities of 1-aminocyclopropane-1-carboxylate synthase (ACS), and 1-aminocyclopropane-1-carboxylate oxidase (ACO) and gene expression of acs2, aco1, and aco2 in the cucumber leaves. The results indicate that ethylene production was increased significantly under salt stress as did ACC and MACC content, the activities of ACS and ACO, and the transcriptional level of acs2, whereas the gene expression of aco1 and aco2 was somewhat decreased. However, exogenous Spd treatment depressed the content of ACC and MACC, ACS activity, and the level of acs2 transcripts in the leaves of salt-stressed cucumber. Although the activity of ACO and gene expressions of aco1 and aco2 increased by Spd, ethylene emission was inhibited. Our results suggest that application of exogenous Spd could reverse salinity-induced ethylene production by inhibiting the transcription and activity of ACS under salt stress. We conclude that exogenous Spd could modify the biosynthesis of ethylene to enhance the tolerance of cucumber seedlings to salt stress.

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16

Ren, Xiaolei, Xiaohua Wang, Yuren Sun, Xiaodong Chi, Daniel Mangel, Hongyu Wang y Jonathan L. Sessler. "Amidinium–carboxylate salt bridge mediated proton-coupled electron transfer in a donor–acceptor supramolecular system". Organic Chemistry Frontiers 6, n.º 5 (2019): 584–90. http://dx.doi.org/10.1039/c8qo01408f.

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17

Banville, Jacques, Philippe Lapointe, Bernard Belleau y Marcel Menard. "Nuclear analogs of β-lactam antibiotics. Synthesis of 6,6-disubstituted acylaminopenems". Canadian Journal of Chemistry 66, n.º 6 (1 de junio de 1988): 1390–99. http://dx.doi.org/10.1139/v88-225.

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The preparation of 6α-methyl-2-methyl-6β-phenoxyacetamidopenem-3-carboxylate, 6α-methoxy-2-methyl-6β-phenoxyacetamidopenem-3-carboxylate, and 6α-methoxy-2-methyl-6β-phenylmalonylamidopenem-3-carboxylate from penicillin V and 6-aminopenicillanic acid is described. These penems have been isolated and characterized as their sodium or potassium salt. The chemical stability of the above compounds was determined as their half-life in aqueous buffer. In this way, it was found that the 6α-methyl analog was more stable than the parent 6-monosubstituted acylaminopenem while the remaining analogs were of comparable stability.

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18

Wang, Yi y Bo Liu. "Efficient and recyclable heterogeneous zinc alkyl carboxylate catalyst for the synthesis of N-phenyl carbamate from aniline and dimethylcarbonate". Catalysis Science & Technology 5, n.º 1 (2015): 109–13. http://dx.doi.org/10.1039/c4cy01130a.

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19

Swinton Darious, Robert, Packianathan Thomas Muthiah y Franc Perdih. "Supramolecular hydrogen-bonding patterns in salts of the antifolate drugs trimethoprim and pyrimethamine". Acta Crystallographica Section C Structural Chemistry 74, n.º 4 (23 de marzo de 2018): 487–503. http://dx.doi.org/10.1107/s2053229618004072.

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Nine salts of the antifolate drugs trimethoprim and pyrimethamine, namely, trimethoprimium [or 2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidin-1-ium] 2,5-dichlorothiophene-3-carboxylate monohydrate (TMPDCTPC, 1:1), C14H19N4O3 +·C5HCl2O2S−, (I), trimethoprimium 3-bromothiophene-2-carboxylate monohydrate, (TMPBTPC, 1:1:1), C14H19N4O3 +·C5H2BrO2S−·H2O, (II), trimethoprimium 3-chlorothiophene-2-carboxylate monohydrate (TMPCTPC, 1:1:1), C14H19N4O3 +·C5H2ClO2S−·H2O, (III), trimethoprimium 5-methylthiophene-2-carboxylate monohydrate (TMPMTPC, 1:1:1), C14H19N4O3 +·C6H5O2S−·H2O, (IV), trimethoprimium anthracene-9-carboxylate sesquihydrate (TMPAC, 2:2:3), C14H19N4O3 +·C15H9O2 −·1.5H2O, (V), pyrimethaminium [or 2,4-diamino-5-(4-chlorophenyl)-6-ethylpyrimidin-1-ium] 2,5-dichlorothiophene-3-carboxylate (PMNDCTPC, 1:1), C12H14ClN4 +·C5HCl2O2S−, (VI), pyrimethaminium 5-bromothiophene-2-carboxylate (PMNBTPC, 1:1), C12H14ClN4 +·C5H2BrO2S−, (VII), pyrimethaminium anthracene-9-carboxylate ethanol monosolvate monohydrate (PMNAC, 1:1:1:1), C12H14ClN4 +·C15H9O2 −·C2H5OH·H2O, (VIII), and bis(pyrimethaminium) naphthalene-1,5-disulfonate (PMNNSA, 2:1), 2C12H14ClN4 +·C10H6O6S2 2−, (IX), have been prepared and characterized by single-crystal X-ray diffraction. In all the crystal structures, the pyrimidine N1 atom is protonated. In salts (I)–(III) and (VI)–(IX), the 2-aminopyrimidinium cation interacts with the corresponding anion via a pair of N—H...O hydrogen bonds, generating the robust R 2 2(8) supramolecular heterosynthon. In salt (IV), instead of forming the R 2 2(8) heterosynthon, the carboxylate group bridges two pyrimidinium cations via N—H...O hydrogen bonds. In salt (V), one of the carboxylate O atoms bridges the N1—H group and a 2-amino H atom of the pyrimidinium cation to form a smaller R 2 1(6) ring instead of the R 2 2(8) ring. In salt (IX), the sulfonate O atoms mimic the role of carboxylate O atoms in forming an R 2 2(8) ring motif. In salts (II)–(IX), the pyrimidinium cation forms base pairs via a pair of N—H...N hydrogen bonds, generating a ring motif [R 2 2(8) homosynthon]. Compounds (II) and (III) are isomorphous. The quadruple DDAA (D = hydrogen-bond donor and A = hydrogen-bond acceptor) array is observed in (I). In salts (II)–(IV) and (VI)–(IX), quadruple DADA arrays are present. In salts (VI) and (VII), both DADA and DDAA arrays co-exist. The crystal structures are further stabilized by π–π stacking interactions [in (I), (V) and (VII)–(IX)], C—H...π interactions [in (IV)–(V) and (VII)–(IX)], C—Br...π interactions [in (II)] and C—Cl...π interactions [in (I), (III) and (VI)]. Cl...O and Cl...Cl halogen-bond interactions are present in (I) and (VI), with distances and angles of 3.0020 (18) and 3.5159 (16) Å, and 165.56 (10) and 154.81 (11)°, respectively.

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20

Fernandes, José A., Bing Liu, João P. C. Tomé, Luís Cunha-Silva y Filipe A. Almeida Paz. "Crystal structure of 5-amino-4H-1,2,4-triazol-1-ium pyrazine-2-carboxylate: an unexpected salt arising from the decarboxylation of both precursors". Acta Crystallographica Section E Crystallographic Communications 71, n.º 7 (24 de junio de 2015): 840–43. http://dx.doi.org/10.1107/s205698901501172x.

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Both the 3-amino-2H,4H-1,2,4-triazolium cation and the pyrazine-2-carboxylate anion in the title salt, C2H5N4+·C5H3N2O2−, were formed by an unexpected decarboxylation reaction, from 5-amino-1H-1,2,4-triazole-3-carboxylic acid and pyrazine-2,3-dicarboxylic acid, respectively. The dihedral angle between the pyrazine ring (r.m.s. deviation = 0.008 Å) and the carboxylate group in the anion is 3.7 (3)°. The extended structure of the salt contains a supramolecular zigzag tape in which cations and anions are engaged in strong and highly directional N—H...N,O hydrogen bonds, formingR22(8) andR22(9) graph-set motifs. The packing between the tapes is mediated by π–π stacking interactions between the triazole and pyrazine rings.

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21

Dandapat, Manika y Debabrata Mandal. "Fluorescent Ag nanoclusters prepared in aqueous poly(acrylic acid-co-maleic acid) solutions: a spectroscopic study of their excited state dynamics, size and local environment". Physical Chemistry Chemical Physics 18, n.º 4 (2016): 2564–73. http://dx.doi.org/10.1039/c5cp05282c.

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22

Walter, Olaf. "1-(5,5-Dimethoxypentyl)-3-methylimidazolium-2-carboxylate". Acta Crystallographica Section E Structure Reports Online 69, n.º 11 (5 de octubre de 2013): o1611. http://dx.doi.org/10.1107/s1600536813027013.

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The title compound, C12H20N2O4, represents one example of a zwitterionic imidazolium salt with a carboxylate group at the 2-position of the imidazolium ring. The dihedral angle between the heterocyclic ring and the carboxylate group is 31.3 (1)°. The side chain linking the N atom of the ring and the methine C atom has agauche–anti–anticonformation [torsion angles = −60.3 (2), −175.7 (2) and 178.7 (2)°, respectively]. In the crystal, molecules are linked by short C—H...O hydrogen bonds involving the C—H groups in the aromatic ring to generate (001) sheets.

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23

Dai, Chuntao, Jianhua Nie, Yuehua Lin y Jun Wang. "Dimethylammonium 5-carboxy-2-(1-oxo-1λ5-pyridin-2-yl)-1H-imidazole-4-carboxylate". Acta Crystallographica Section E Structure Reports Online 68, n.º 8 (28 de julio de 2012): o2600. http://dx.doi.org/10.1107/s1600536812033557.

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In the title salt, C2H8N+·C10H6N3O5−, the imidazolecarboxylate anion is essentially planar [maximum deviation from the least-squares plane = 0.046 (5) Å], with a dihedral angle between the rings of 2.7 (2)°. This conformation is maintained by the presence of both intramolecular carboxy–carboxylate O—H...O and imidazole–oxide N—H...O hydrogen bonds. Iin the crystal, cation–carboxylate N—H...O and cation–imidazole N—H...N hydrogen bonds result in chains along thebaxis.

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24

Zakrzewski, Maciej, Natalia Kwietniewska, Wojciech Walczak y Piotr Piątek. "A non-multimacrocyclic heteroditopic receptor that cooperatively binds and effectively extracts KAcO salt". Chemical Communications 54, n.º 51 (2018): 7018–21. http://dx.doi.org/10.1039/c8cc03395a.

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25

Medoš, Žiga, Miha Virant, Urša Štanfel, Boštjan Žener, Janez Košmrlj y Marija Bešter-Rogač. "Scalable Synthesis of Salt-free Quaternary Ammonium Carboxylate Catanionic Surfactants". Acta Chimica Slovenica 67, n.º 1 (20 de marzo de 2020): 270–75. http://dx.doi.org/10.17344/acsi.2019.5413.

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26

Katagiri, Hiroshi, Yoshie Tanaka, Yoshio Furusho y Eiji Yashima. "Multicomponent Cylindrical Assemblies Driven by Amidinium–Carboxylate Salt-Bridge Formation". Angewandte Chemie International Edition 46, n.º 14 (26 de marzo de 2007): 2435–39. http://dx.doi.org/10.1002/anie.200603921.

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27

Katagiri, Hiroshi, Yoshie Tanaka, Yoshio Furusho y Eiji Yashima. "Multicomponent Cylindrical Assemblies Driven by Amidinium–Carboxylate Salt-Bridge Formation". Angewandte Chemie 119, n.º 14 (26 de marzo de 2007): 2487–91. http://dx.doi.org/10.1002/ange.200603921.

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28

Ito, Seito, Jyunichi Kawata, Munekazu Kameda y Mitsuo Miyazawa. "Lower Irritation Potential of Laureth-3 Carboxylate Amino Acid Salt". Journal of Surfactants and Detergents 19, n.º 2 (11 de diciembre de 2015): 421–24. http://dx.doi.org/10.1007/s11743-015-1771-x.

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29

Piatek, Piotr. "ChemInform Abstract: A Selective Chromogenic Chemosensor for Carboxylate Salt Recognition." ChemInform 42, n.º 34 (28 de julio de 2011): no. http://dx.doi.org/10.1002/chin.201134205.

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30

Gonzalez, Diana, Joseph T. Golab, Andrew J. Cigler y James A. Kaduk. "Crystal structures of two isostructural compounds: a second polymorph of dipotassium hydrogen citrate, K2HC6H5O7, and potassium rubidium hydrogen citrate, KRbHC6H5O7". Acta Crystallographica Section C Structural Chemistry 76, n.º 7 (30 de junio de 2020): 706–15. http://dx.doi.org/10.1107/s2053229620008281.

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The crystal structures of a new polymorph of dipotassium hydrogen citrate, 2K+·HC6H5O7 2−, and potassium rubidium hydrogen citrate, K+·Rb+·HC6H5O7 2−, have been solved and refined using laboratory powder X-ray diffraction and optimized using density functional techniques. In the new polymorph of the dipotassium salt, KO7 and KO8 coordination polyhedra share corners and edges to form a three-dimensional framework with channels parallel to the a axis and [111]. The hydrophobic methylene groups face each other in the channels. The un-ionized carboxylic acid group forms a strong charge-assisted hydrogen bond to the central ionized carboxylate group. The hydroxy group forms an intermolecular hydrogen bond to a different central carboxylate group. In the potassium rubidium salt, the K+ and Rb+ cations are disordered over two sites, in approximately 0.72:0.28 and 0.28:0.72 ratios. KO8 and RbO9 coordination polyhedra share corners and edges to form a three-dimensional framework with channels parallel to the a axis. The un-ionized carboxylic acid group forms a strong charge-assisted hydrogen bond to an ionized carboxylate group. The hydroxy group forms an intermolecular hydrogen bond to the central carboxylate group. Density functional theory (DFT) calculations on the ordered cation structures suggest that interchange of K+ and Rb+ at the two cation sites changes the energy insignificantly.

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31

Akhmad Aznan, Aina Mardia, Zanariah Abdullah y Edward R. T. Tiekink. "Crystal structures of 1,4-diazabicyclo[2.2.2]octan-1-ium 4-nitrobenzoate dihydrate and 1,4-diazabicyclo[2.2.2]octane-1,4-diium bis(4-nitrobenzoate): the influence of solvent upon the stoichiometry of the formed salt". Acta Crystallographica Section E Structure Reports Online 70, n.º 7 (23 de junio de 2014): 31–35. http://dx.doi.org/10.1107/s1600536814011532.

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The 1:1 co-crystallization of 1,4-diazabicyclo[2.2.2]octane (DABCO) with 4-nitrobenzoic acid in ethanol–water (3/1) gave the salt dihydrate C6H13N2+·C7H4NO4−·2H2O, (1), whereas from methanol, the salt C6H14N22+·2C7H4NO4−, (2), was isolated. In (1), the cation and anion are linked by a strong N—H...O hydrogen bond, and the carboxylate anion is close to planar [dihedral angle between terminal residues = 6.83 (9)°]. In (2), a three-ion aggregate is assembled by two N—H...O hydrogen bonds, and the carboxylate anions are again close to planar [dihedral angles between terminal residues = 1.7 (3) and 5.9 (3)°]. Through the intervention of solvent water molecules, which self-assemble into helical supramolecular chains along thebaxis, the three-dimensional architecture in (1) is stabilized by water–DABCO O—H...N and water–carboxylate O—H...O hydrogen bonds, with additional stability afforded by C—H...O interactions. The global crystal structure comprises alternating layers of water molecules and ion pairs stacked along thecaxis. In the crystal of (2), the three-ion aggregates are assembled into a three-dimensional architecture by a large number of methylene–carboxylate/nitro C—H...O interactions as well as π–π contacts between inversion-related benzene rings [inter-centroid distances = 3.5644 (16) and 3.6527 (16) Å]. The cations and anions assemble into alternating layers along thecaxis.

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32

Medved'ko, Aleksei V., Andrei V. Churakov, Haojie Yu, Wang Li y Sergey Z. Vatsadze. "Crystal structure of 3-aminopyridinium 1′-carboxyferrocene-1-carboxylate". Acta Crystallographica Section E Crystallographic Communications 73, n.º 6 (16 de mayo de 2017): 856–58. http://dx.doi.org/10.1107/s2056989017007058.

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The structure of the title salt, (C5H7N2)[Fe(C6H4O2)(C6H5O2)], consists of 3-aminopyridinium cations and 1′-carboxyferrocene-1-carboxylate monoanions. The ferrocenyl moiety of the anion adopts a typical sandwich structure, with Fe—C distances in the range 2.0270 (15)–2.0568 (17) Å. The anion possesses an eclipsed conformation, with the torsion angle φ (Csubst—Cpcent—Cpcent— Csubst) equal to 66.0°. The conformations of other 1′-carboxyferrocene-1-carboxylate monoanions are compared and analyzed on the basis of literature data.

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33

Ge, Chunhua, Xiangdong Zhang, Rui Zhang y Chenglong Zhang. "3-(Dihydroxyboryl)anilinium 6-carboxypyridine-2-carboxylate". Acta Crystallographica Section E Structure Reports Online 68, n.º 8 (25 de julio de 2012): o2559. http://dx.doi.org/10.1107/s1600536812031790.

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In the anion of the title molecular salt, C6H9BNO2+·C7H4NO4−, the dihedral angles between the –COO2−and –CO2H groups and their attached ring are 4.02 (13) and 21.41 (10)°, respectively. The B atom in the cation adopts asyn–syngeometry and the dihedral angle between the –B(OH)2group and its attached ring is 11.06 (5)°. In the crystal, O—H...O, N—H...O and N—H...N hydrogen bonds link the components into a three-dimensional network.

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34

Spassova, Maria K., Antonín Holý y Milena Masojídková. "Ribonucleosides of 3-amino- and 3,5-diaminopyrazole-4-carboxylic acid and their open-chain analogues: Synthesis and reactions". Collection of Czechoslovak Chemical Communications 51, n.º 7 (1986): 1512–31. http://dx.doi.org/10.1135/cccc19861512.

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Bis(trimethylsilyl) derivative of ethyl 3-aminopyrazole-4-carboxylate (VI) and tris(trimethylsilyl) derivative of ethyl 3,5-diaminopyrazole-4-carboxylate (VII) on reaction with 2,3,5-tri-O-benzoyl-D-ribofuranolyl chloride and subsequent debenzoylation afforded the respective β-D-ribofuranosyl derivatives VIIIa and Xa. Their alkaline hydrolysis led to 1-(β-D-ribofuranosyl)-3-aminopyrazole-4-carboxylic acid (VIIIc) and 1-(β-D-ribofuranosyl)-3,5-diaminopyrazole-4-carboxylic acid (Xb). The esters VIIIa and Xa were not ammonolyzed under normal conditions. Contrary to nucleosidation of the silyl derivatives VI and VII, sodium salt of ethyl 3-aminopyrazole-4-carboxylate was alkylated with 4-chloromethyl-2,2-dimethyl-1,3-dioxolane (XI) or 5-(p-toluenesulfonyloxy)-1,3-dioxane (XVIIb) to give a mixture of the N-isomeric derivatives XIIIa, XIXa and XIIa, XVIIIa, respectively; sodium salt of the 3,5-diamino derivative V reacted with these synthons under formation of the corresponding compounds XIIIb and XXa. Subsequent alkaline and acid hydrolysis of XIIa and XIIIb gave the open-chain analogs of nucleosides XV and XVI. The N-(1,3-dioxan-5-yl) derivatives XVIIIc and XXa resisted acid hydrolysis, giving rise only to carboxylic acids XVIIIb and XXb.

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35

Divya Bharathi, M., G. Ahila, J. Mohana, G. Chakkaravarthi y G. Anbalagan. "Crystal structure of 8-hydroxyquinolinium 2-carboxy-6-nitrobenzoate monohydrate". Acta Crystallographica Section E Crystallographic Communications 71, n.º 4 (25 de marzo de 2015): o261—o262. http://dx.doi.org/10.1107/s205698901500571x.

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In the title hydrated salt, C9H8NO+·C8H4NO6−·H2O, the deprotonated carboxylate group is almost normal to its attached benzene ring [dihedral angle = 83.56 (8)°], whereas the protonated carboxylate group is close to parallel [dihedral angle = 24.56 (9)°]. In the crystal, the components are linked by N—H...O and O—H...O hydrogen bonds, generating [001] chains. The packing is consolidated by C—H...O and π–π [centroid-to-centroid distances = 3.6408 (9) and 3.6507 (9) Å] interactions, which result in a three-dimensional network.

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36

LI, XIAO-XI, JI-LONG ZHANG, QING-CHUAN ZHENG, YING-LU CUI, RUI-JUAN NIU, HONG-XING ZHANG y CHIA-CHUNG SUN. "CATALYTIC MECHANISM OF ALL-TRANS-RETINOIC ACID 4-HYDROXYLATION MEDIATED BY CYTOCHROME P450 2C8: HOW DOES ARGININE 241 AFFECT THE C–H BOND ACTIVATION?" Journal of Theoretical and Computational Chemistry 12, n.º 08 (diciembre de 2013): 1341009. http://dx.doi.org/10.1142/s0219633613410095.

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Experiments revealed that cytochrome P450 2C8 enzyme (CYP2C8) has two distinct substrate binding sites to the physiologically important molecules, retinoic acids, and the main difference between these two binding sites is whether there is a salt bridge interaction between the anionic carboxylate tail of retinoic acids and the surrounding protein environment. However, the influence of such salt bridge interaction toward catalysis is still elusive. In the present paper, density functional theory (DFT) calculations were employed to research the reaction mechanism of all-trans-retinoic acid (atRA) 4-hydroxylation mediated by CYP2C8. Our DFT calculations revealed that such salt bridge interaction has obvious effects on the reaction mechanism of atRA 4-hydroxylation. In the binding site containing a salt bridge interaction between the anionic carboxylate tail of atRA and the cationic guanidine group of Arg241, C – H bond activation proceeds via a normal hydrogen atom transfer (HAT) mechanism; in the other site without this salt bridge interaction, however, C – H bond activation is achieved via a stepwise electron transfer and hydrogen atom transfer, thus, a novel ET/HAT mechanism. These findings enrich the mechanism patterns of C – H bond activation catalyzed by metalloenzymes and their biomimetics. Meanwhile, the self-interaction error (SIE) problem encountered during our calculations in vacuum was affected and removed by the inclusion of an external electric field in the calculations.

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37

Zakaria, Choudhury M., Alan J. Lough, George Ferguson y Christopher Glidewell. "Adducts of 1,4,8,11-tetraazacyclotetradecane with carboxylic acids: hydrogen-bonded supramolecular structures in two or three dimensions". Acta Crystallographica Section B Structural Science 60, n.º 1 (21 de enero de 2004): 65–75. http://dx.doi.org/10.1107/s0108768103026739.

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Four solvated salt-type adducts derived from cyclam (1,4,8,11-tetraazacyclotetradecane) and carboxylic acids have been structurally characterized. In the salt derived from adamantane-1-carboxylic acid, 4,11-diaza-1,8-diazoniacyclotetradecane bis(adamantane-1-carboxylate) tetrahydrate, (1) (monoclinic, P21/c, Z′ = 0.5), where the cation lies across a centre of inversion, the anions and the water molecules form chains of edge-fused R_4^2(8) and R_6^6(16) rings, which are linked into sheets by the cations. In the 4-aminobenzoate salt, 4,11-diaza-1,8-diazoniacyclotetradecane bis(4-aminobenzoate) monohydrate, (2) (monoclinic, C2/c, Z′ = 0.5), where the cation lies across a centre of inversion and the water molecule lies across a twofold rotation axis, the cations and anions generate a three-dimensional framework, readily analysed in terms of two distinct two-dimensional substructures, viz. (10\overline 1) sheets of R_8^6(46) rings, and pairwise interwoven (100) sheets, reinforced by water molecules. The 3-hydroxybenzoate salt, 4,11-diaza-1,8-diazoniacyclotetradecane bis(3-hydroxybenzoate) dihydrate, (3) (monoclinic, Pc, Z′ = 1), contains a three-dimensional framework constructed from anions and water molecules only, which encapsulates large voids and within which the cations are linked to the anion–water framework via N—H...O hydrogen bonds. There are two independent cations in 4,11-diaza-1,8-diazoniacyclotetradecane 5-hydroxyisophthalate(2−) methanol solvate, (4) (monoclinic, P21/c, Z′ = 1), both lying across centres of inversion but with entirely different configurations. The anions alone form simple chains, and these chains are linked by the two types of cation into a three-dimensional framework from which the methanol molecules are pendent. Comparisons are made with carboxylate complexes of the [Ni(cyclam)]2+ cation and with carboxylate salts derived from meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane.

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38

Smith, Graham. "Crystal structure of the magnesium salt of the herbicide 2,4-D: pentaaqua[(2,4-dichlorophenoxy)acetato-κO]magnesium (2,4-dichlorophenoxy)acetate hemihydrate". Acta Crystallographica Section E Structure Reports Online 70, n.º 10 (3 de septiembre de 2014): 161–63. http://dx.doi.org/10.1107/s1600536814019357.

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In the crystal structure of the title magnesium salt of the phenoxy herbicide (2,4-dichlorophenoxy)acetic acid (2,4-D), [Mg(C8H5Cl2O3)(H2O)5](C8H5Cl2O3)·0.5H2O, the discrete cationic MgO6complex unit comprises a carboxylate O-donor from a monodentate 2,4-D anionic ligand and five water molecules, resulting in a slightly distorted octahedral coordination sphere. The free 2,4-D anions are linked to the complex units through duplex water–carboxylate O—H...O hydrogen bonds through the coordinating water molecules. In the crystal, inter-unit O—H...O hydrogen-bonding interactions involving coordinating water molecules as well as the solvent water molecule (occupancy 0.5) with carboxylate O-atom acceptors, give a layered structure lying parallel to (001), in which π–π ligand–cation interactions [minimum ring centroid separation = 3.6405 (17) Å] and a short O—H...Cl interaction are also found.

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39

Tang, Long, Huan-Huan Wang, Yu-Hao Fu, Yi-Tong Wang, JiJiang Wang y XiangYang Hou. "Three cobalt-based coordination polymers with tripodal carboxylate and imidazole-containing ligands: syntheses, structures, properties and DFT studies". RSC Advances 9, n.º 66 (2019): 38902–11. http://dx.doi.org/10.1039/c9ra07737e.

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The tripodal carboxylate ligand can be employed in Co(ii) salt/imidazole-containing ligand systems to generate 1D chain, 2D layer, and 2D to 3D network, and the fluorescence properties of 1–3 and magnetic behavior of 1 and 2 have been investigated.

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40

Smith, Graham. "Hydrogen-bonded two- and three-dimensional polymeric structures in the ammonium salts of 3,5-dinitrobenzoic acid, 4-nitrobenzoic acid and 2,4-dichlorobenzoic acid". Acta Crystallographica Section C Structural Chemistry 70, n.º 3 (13 de febrero de 2014): 315–19. http://dx.doi.org/10.1107/s2053229614002459.

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The structures of ammonium 3,5-dinitrobenzoate, NH4+·C7H3N2O6−, (I), ammonium 4-nitrobenzoate dihydrate, NH4+·C7H4NO4−·2H2O, (II), and ammonium 2,4-dichlorobenzoate hemihydrate, NH4+·C7H3Cl2O2−·0.5H2O, (III), have been determined and their hydrogen-bonded structures are described. All three salts form hydrogen-bonded polymeric structures,viz.three-dimensional in (I) and two-dimensional in (II) and (III). With (I), a primary cation–anion cyclic association is formed [graph setR43(10)] through N—H...O hydrogen bonds, involving a carboxylate group with both O atoms contributing to the hydrogen bonds (denoted O,O′-carboxylate) on one side and a carboxylate group with one O atom involved in two hydrogen bonds (denoted O-carboxylate) on the other. Structure extension involves N—H...O hydrogen bonds to both carboxylate and nitro O-atom acceptors. With structure (II), the primary inter-species interactions and structure extension into layers lying parallel to (001) are through conjoined cyclic hydrogen-bonding motifs,viz.R43(10) (one cation, an O,O′-carboxylate group and two water molecules) and centrosymmetricR42(8) (two cations and two water molecules). The structure of (III) also has conjoinedR43(10) and centrosymmetricR42(8) motifs in the layered structure but these differ in that the first motif involves one cation, an O,O′-carboxylate group, an O-carboxylate group and one water molecule, and the second motif involves two cations and two O-carboxylate groups. The layers lie parallel to (100). The structures of salt hydrates (II) and (III), displaying two-dimensional layered arrays through conjoined hydrogen-bonded nets, provide further illustration of a previously indicated trend among ammonium salts of carboxylic acids, but the anhydrous three-dimensional structure of (I) is inconsistent with that trend.

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41

Li, Jie, Qiao Mei Chen, Rong Ming Zhang y Wei Tong. "Synthesis and Properties of Novel Carboxylate Gemini Surfactant". Advanced Materials Research 201-203 (febrero de 2011): 2695–99. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2695.

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The novel anionic gemini surfactant, isodium salt of N, N’, N”- trilauroyl-diethylenetriamine diacetate(TDAD), was synthesized with ethylenediamine, sodium chloroacetate and lauroyl chloride by displacement reaction and acylation reaction. The results show that TDAD has fairly low critical micelle concentration (cmc) and high surface activity. The adsorption isotherm of TDAD at the interface of oil sand/aqueous solution is taken on “S” model, and the adsorption loss of TDAD is much lower than that of the traditional monomer sodium laurate (SL).

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42

Razavizadeh, Roya y Ali Ehsanpour. "Effects of salt stress on proline content, expression of delta-1-pyrroline-5-carboxylate synthetase, and activities of catalase and ascorbate peroxidase in transgenic tobacco plants". Biological Letters 46, n.º 2 (1 de enero de 2009): 63–75. http://dx.doi.org/10.2478/v10120-009-0002-4.

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Effects of salt stress on proline content, expression of delta-1-pyrroline-5-carboxylate synthetase, and activities of catalase and ascorbate peroxidase in transgenic tobacco plantsIn arid and semiarid regions, soil salinity limits crop production. Proline accumulation in transgenic plants results in increased stress tolerance, but the underlying mechanism was unclear. To elucidate it, effects of salt stress on the expression pattern of Δ1-pyrroline-5-carboxylate synthetase (P5CS), proline content, catalase (CAT), and ascorbate peroxidase (APX) activities were analyzed in transgenic tobacco (Nicotiana tabacumcv. Wisconsin). Transgenic tobacco plants containing CaMV 35S promoter and theP5CSgene from moth bean (Vigna aconitifolia), linked to theNPTIIgene, were culturedin vitrowith or without 300 mM NaCl. The expression pattern ofP5CSwas evaluated using semiquantitative RT-PCR (reverse transcription-polymerase chain reaction). Time-course experiments showed an increase in proline content after 4 h of the treatment. The level ofP5CStranscripts was increased significantly in leaves and roots of transgenic plants after 24 and 48 h of treatment. This rise in transcripts was concomitant with the highest increase in proline content. In addition, CAT and APX activities increased under salt stress, and their highest activities were observed after 24 and 48 h of NaCl treatment. These results suggest thatP5CSis an inducible gene regulating the activities of CAT and APX and the accumulation of proline in plants subjected to salt stress.

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43

Helliwell, Madeleine, Yun You y John A. Joule. "The dipolar cycloaddition of methyl acrylate to 1,5,6-trimethyl-3-oxidopyrazinium". Acta Crystallographica Section E Structure Reports Online 62, n.º 4 (8 de marzo de 2006): o1293—o1294. http://dx.doi.org/10.1107/s1600536806007501.

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5,6-Dimethylpyrazin-2-one reacts with iodomethane to give a quaternary salt, deprotonation of which liberates a 3-oxidopyrazinium which undergoes a 1,3-dipolar cycloaddition with methyl acrylate to form methyl 5,8-dimethyl-4-methylene-2-oxo-3,8-diazabicyclo[3.2.1]octane-6-exo-carboxylate, C11H16N2O3, as the major product.

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44

Antonio, S. G., C. O. Paiva-Santos, P. P. Corbi, A. C. Massabni y F. C. Andrade. "Powder X-ray characterization of lithium thiazolidine-4-carboxylate". Powder Diffraction 24, n.º 1 (marzo de 2009): 44–47. http://dx.doi.org/10.1154/1.3076131.

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Powder X-ray diffraction studies of a lithium salt of thiazolidine-4-carboxylic acid (Li-TC4) of composition LiC4H6NSO2 are presented in this paper. Analysis of the synchrotron powder X-ray diffraction data showed that the complex has an orthorhombic symmetry with space group P212121. Unit cell parameters after the refinement using the Pawley method are: a=19.4931(3) Å, b=4.947 77(6) Å, c=6.201 64(8) Å, and V=598.051 Å3.

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45

Belandria, Lusbely M., Asiloé J. Mora, Gerzon E. Delgado y Alexander Briceño. "4-Carboxypiperidinium 1-carboxycyclobutane-1-carboxylate". Acta Crystallographica Section C Crystal Structure Communications 68, n.º 2 (18 de enero de 2012): o88—o91. http://dx.doi.org/10.1107/s0108270111054977.

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The title salt, C6H12NO2+·C6H7O4−or ISO+·CBDC−, is an ionic ensemble assisted by hydrogen bonds. The amino acid moiety (ISO or piperidine-4-carboxylic acid) has a protonated ring N atom (ISO+or 4-carboxypiperidinium), while the semi-protonated acid (CBDC−or 1-carboxycyclobutane-1-carboxylate) has the negative charge residing on one carboxylate group, leaving the other as a neutral –COOH group. The –+NH2– state of protonation allows the formation of a two-dimensional crystal packing consisting of zigzag layers stacked alongaseparated by van der Waals distances. The layers extend in thebcplane connected by a complex network of N—H...O and O—H...O hydrogen bonds. Wave-like ribbons, constructed from ISO+and CBDC−units and described by the graph-set symbolsC33(10) andR33(14), run alternately in opposite directions alongc. Intercalated between the ribbons are ISO+cations linked by hydrogen bonds, forming rings described by the graph-set symbolsR66(30) andR42(18). A detailed analysis of the structures of the individual components and the intricate hydrogen-bond network of the crystal structure is given.

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46

Djebaili, Rihab, Marika Pellegrini, Massimiliano Rossi, Cinzia Forni, Maria Smati, Maddalena Del Gallo y Mahmoud Kitouni. "Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions". Soil Systems 5, n.º 2 (10 de abril de 2021): 26. http://dx.doi.org/10.3390/soilsystems5020026.

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This study aimed to characterize the halotolerant capability, in vitro, of selected actinomycetes strains and to evaluate their competence in promoting halo stress tolerance in durum wheat in a greenhouse experiment. Fourteen isolates were tested for phosphate solubilization, indole acetic acid, hydrocyanic acid, and ammonia production under different salt concentrations (i.e., 0, 0.25, 0.5, 0.75, 1, 1.25, and 1.5 M NaCl). The presence of 1-aminocyclopropane-1-carboxylate deaminase activity was also investigated. Salinity tolerance was evaluated in durum wheat through plant growth and development parameters: shoot and root length, dry and ash-free dry weight, and the total chlorophyll content, as well as proline accumulation. In vitro assays have shown that the strains can solubilize inorganic phosphate and produce indole acetic acid, hydrocyanic acid, and ammonia under different salt concentrations. Most of the strains (86%) had 1-aminocyclopropane-1-carboxylate deaminase activity, with significant amounts of α-ketobutyric acid. In the greenhouse experiment, inoculation with actinomycetes strains improved the morpho-biochemical parameters of durum wheat plants, which also recorded significantly higher content of chlorophylls and proline than those uninoculated, both under normal and stressed conditions. Our results suggest that inoculation of halotolerant actinomycetes can mitigate the negative effects of salt stress and allow normal growth and development of durum wheat plants.

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47

Shi, Liang, Jia Ping Liu, Jing Shun Cai, Yun Gao y Jian Zhong Liu. "Influence of Multi-Phase Carboxylate Salt on Mortar Properties under Sulfate Environment". Key Engineering Materials 783 (octubre de 2018): 120–25. http://dx.doi.org/10.4028/www.scientific.net/kem.783.120.

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A novel multi-phase carboxylate (MPC) salt was prepared by free radical polymerization. Influence of MPC salt on properties of mortar under sulfate environment was investigated. The results from static solution soaking and wet-dry cycling tests indicated that MPC would not bring negative effects on strength and shrinkage of mortar. In particular, MPC was able to reduce the strength loss as a result of inhibiting the generation and growth of ettringite in static solution soaking test. The crystal expansion of AFt was reduced since the Ca2+ dissolution and SO42- ingress were less. Meanwhile, the strength loss of mortar under sulfate wet-dry cycling could be reduced as well by MPC. MPC inhibited the growth of CaSO4·2H2O crystals by replacing the functional groups. The growth of micro-cracks in cement paste was inhibted and the the risk of crystal expansion and destruction of mortar was reduced. It was believed that MPC exhibited an excellent sulfate attack resistance for mortar.

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48

Cheng, Zhenyu, Eunmi Park y Bernard R. Glick. "1-Aminocyclopropane-1-carboxylate deaminase from Pseudomonas putida UW4 facilitates the growth of canola in the presence of salt". Canadian Journal of Microbiology 53, n.º 7 (julio de 2007): 912–18. http://dx.doi.org/10.1139/w07-050.

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The growth of canola plants treated with either wild-type Pseudomonas putida UW4 or a 1-aminocyclopropane-1-carboxylate (ACC) deaminase minus mutant of this strain was monitored in the presence of inhibitory levels of salt, i.e., 1.0 mol/L at 10 °C and 150 mmol/L at 20 °C. This strain is psychrotolerant with a maximal growth rate of approximately 30 °C and the ability to proliferate at 4 °C. Although plant growth was inhibited dramatically by the addition of 1.0 mol/L salt at 10 °C and only slightly by 150 mmol/L salt at 20 °C under both sets of conditions, the addition of the wild type but not the mutant strain of P. putida UW4 significantly improved plant growth. This result confirms the previous suggestion that bacterial strains that contain ACC deaminase confer salt tolerance to plants by lowering salt-induced ethylene synthesis.

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49

Wardell, James L., Solange M. S. V. Wardell y Edward R. T. Tiekink. "A kryptoracemic salt: 2-{[2,8-bis(trifluoromethyl)quinolin-4-yl](hydroxy)methyl}piperidin-1-ium (+)-3,3,3-trifluoro-2-methoxy-2-phenylpropanoate". Acta Crystallographica Section E Crystallographic Communications 72, n.º 6 (27 de mayo de 2016): 872–77. http://dx.doi.org/10.1107/s2056989016008495.

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The asymmetric unit of the title salt, C17H17F6N2O+·C10H8F3O3−, comprises two piperidin-1-ium cations and two carboxylate anions. The cations, each having an L-shaped conformation owing to the near orthogonal relationship between the quinolinyl and piperidin-1-ium residues, are pseudo-enantiomeric. The anions have the same absolute configuration but differ in the relative orientations of the carboxylate, methoxy and benzene groups. Arguably, the most prominent difference between the anions occurs about the Cq—Ombond as seen in the Cc—Cq—Om—Cmtorsion angles of −176.1 (3) and −67.1 (4)°, respectively (q = quaternary, m = methoxy and c = carboxylate). The presence of Oh—H...Ocand Np—H...Ochydrogen bonds leads to the formation of a supramolecular chain along theaaxis (h = hydroxy and p = piperidin-1-ium); weak intramolecular Np—H...Ohhydrogen bonds are also noted. Chains are connected into a three-dimensional architecture by C—H...F interactions. Based on a literature survey, related molecules/cations adopt a uniform conformation in the solid state based on the letterL.

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50

Sk, Mahasin Alam y Sergei Manzhos. "Sodium Interaction with Disodium Terephthalate Molecule: an Ab Initio Study". MRS Advances 1, n.º 53 (2016): 3579–84. http://dx.doi.org/10.1557/adv.2016.452.

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ABSTRACTDisodium terephthalate (Na2TP), which is a disodium salt of terephthalic acid, is very promising organic electrode material for Na-ion batteries. We present an ab initio study of Na binding mechanism with Na2TP molecule. Specially, we provide the interaction energy of Na atom(s), effect of Na concentration on interaction energy, electronic properties of clean and Na attached Na2TP, and Na binding mechanism with Na2TP. We show that up to eight Na atoms can be attached to a single Na2TP molecule. The interaction energy of Na atoms varies from -0.79 to -0.66 eV with attachment of one to eight Na atoms. The adsorbed Na atom interacts with O atoms of carboxylate group and Na atoms of the salt molecule. The interaction between adsorbed Na and C atoms of the molecule is found to be not important for Na bindings. Attachment of a single Na atom generates a singly occupied orbital which becomes doubly occupied with attachment of second Na atoms. Attachment of more than two Na atoms leads to electron occupation of bonding orbitals formed between Na atoms and the carboxylate groups.

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