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Journal articles on the topic '6-pyridine-dicarboxylic acid'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Hildebrand, U., K. Taraz, and H. Budzikiewicz. "6-(Hydroxythio) carbonyIpyridin-2-carbonsäure und Pyridin-2-carbon- säure-6-monothiocarbonsäure als biosynthetische Zwischenstufen bei der Bildung von Pyridin-2,6-di(monothiocarbonsäure) aus Pyridin-2,6- dicarbonsäure [1] / 6-(Hydroxythio)carbonylpyridine-2-carboxylic Acid and Pyridine-2-carboxylic Acid-6- monothiocarboxylic Acid as Interm ediates in the Biosynthesis of Pyridine-2,6-di(monothiocarboxylic Acid) from Pyridine-2,6-dicarboxylic Acid [1]." Zeitschrift für Naturforschung C 41, no. 7-8 (1986): 691–94. http://dx.doi.org/10.1515/znc-1986-7-805.

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Abstract It is shown by feeding experiments with [3-2H]pyridine-2,6 -dicarboxylic acid that 6 -(hydroxythio)carbonylpyridine-2-carboxylic acid and pyridine-2 -carboxylic acid-6-m onothiocarboxylic acid are intermediates in the biosynthesis of pyridine-2,6 -di(monothiocarboxylic acid) from pyridine-2,6 -dicarboxylic acid produced by Pseudomonas putida. Thus the series of biosynthetic steps - COOH → - CO - SOH → COSH has been demonstrated for the first time.

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2

Smith, Graham, Katherine E. Baldry, Karl A. Byriel, and Colin H. L. Kennard. "Molecular Cocrystals of Carboxylic Acids. XXV The Utility of Urea in Structure Making with Carboxylic Acids and the Crystal Structures of a Set of Six Adducts with Aromatic Acids." Australian Journal of Chemistry 50, no. 7 (1997): 727. http://dx.doi.org/10.1071/c96199.

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Molecular adducts of urea with six aromatic carboxylic acids have been prepared and characterized by using X-ray diffraction methods and infrared spectroscopy. These compounds are with 5-nitrosalicylic acid [(C7H5NO5)2(CH4N2O)] (1), 3,5-dinitrosalicylic acid [(C7H4N2O7)(CH4N2O)] (2), 4-aminobenzoic acid [(C7H7NO2)2(CH4N2O)] (3), o-phthalic acid [(C8H6O4)(CH4N2O)] (4), pyrazine-2,3-dicarboxylic acid [(C4H4N2O4)(CH4N2O)] (5) and pyridine-2,6-dicarboxylic acid [(C7H5NO4)(CH4N2O)2] (6). In the majority of the adducts, all six potential interactive sites on the urea molecules are utilized in hydrog

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3

Novoa de Armas, Héctor, Oswald M. Peeters, Norbert M. Blaton, et al. "6-Methyl-4-phenylthieno[2,3-b]pyridine-2,5-dicarboxylic acid." Acta Crystallographica Section E Structure Reports Online 59, no. 4 (2003): o450—o452. http://dx.doi.org/10.1107/s1600536803005464.

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4

Han, Lizhi, Longyi Jin, Enbo Wang, and Zhongmin Su. "Synthesis and characterization of two isostructural 3d–4f coordination compounds based on pyridine-2,6-dicarboxylic acid and 4,4′-bipyridine." Acta Crystallographica Section C Structural Chemistry 75, no. 6 (2019): 723–27. http://dx.doi.org/10.1107/s2053229619006004.

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The design and synthesis of 3d–4f heterometallic coordination polymers have attracted much interest due to the intriguing diversity of their architectures and topologies. Pyridine-2,6-dicarboxylic acid (H2pydc) has a versatile coordination mode and has been used to construct multinuclear and heterometallic compounds. Two isostructural centrosymmetric 3d–4f coordination compounds constructed from pyridine-2,6-dicarboxylic acid and 4,4′-bipyridine (bpy), namely 4,4′-bipyridine-1,1′-diium diaquabis(μ2-pyridine-2,6-dicarboxylato)tetrakis(pyridine-2,6-dicarboxylato)bis[4-(pyridin-4-yl)pyridinium]co

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5

Cowan, John A., Judith A. K. Howard, Garry, J. McIntyre, Samuel M. F. Lo, and Ian D. Williams. "Variable-temperature neutron diffraction studies of the short, strong hydrogen bonds in the crystal structure of pyridine-3,5-dicarboxylic acid." Acta Crystallographica Section B Structural Science 61, no. 6 (2005): 724–30. http://dx.doi.org/10.1107/s0108768105030077.

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Pyridine-3,5-dicarboxylic acid has been studied by single-crystal neutron diffraction at 15 and 296 K. Pyridine-3,5-dicarboxylic acid, in which the carboxylic acid protons have been replaced by deuterons, has also been studied at 15, 150 and 296 K. The protonated structure contains a short N...H...O hydrogen bond [N...O 2.523 (2) Å at 15 K]. Temperature-dependent proton migration occurs where the N—H distance in the hydrogen bond changes from 1.213 (4) Å at 15 K to 1.308 (6) Å at 300 K. In the deuterated structure the overall hydrogen-bond length increased [N...O 2.538 (3) Å at 15 K] and the m

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6

Kremer, Marius, and Ulli Englert. "Zn and Ni complexes of pyridine-2,6-dicarboxylates: crystal field stabilization matters!" Acta Crystallographica Section E Crystallographic Communications 75, no. 6 (2019): 903–11. http://dx.doi.org/10.1107/s2056989019007461.

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Six reaction products of ZnII and NiII with pyridine-2,6-dicarboxylic acid (H2Lig1), 4-chloropyridine-2,6-dicarboxylic acid (H2Lig2) and 4-hydroxypyridine-2,6-dicarboxylic acid (H2Lig3) are used to pinpoint the structural consequences of crystal field stabilization by an incomplete d shell. The pseudo-octahedral ZnII coordination sphere in bis(6-carboxypicolinato)zinc(II) trihydrate, [Zn(C7H4NO4)2]·3H2O or [Zn(HLig1)2]·3H2O, (1), is significantly less regular than that about NiII in the isostructural compound bis(6-carboxypicolinato)nickel(II) trihydrate, [Ni(C7H4NO4)2]·3H2O or [Ni(HLig1)2]·3H

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7

Napitupulu, Mery, Geoffrey A. Lawrance, Guy J. Clarkson, and Peter Moore. "Methyl 2-[N-(2′-Pyridylmethyl)carbamyl]pyridine-6-carboxylate: A Precursor for Unsymmetrical Diamide Ligands." Australian Journal of Chemistry 59, no. 11 (2006): 796. http://dx.doi.org/10.1071/ch06310.

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Methyl 2-[N-(2′-pyridylmethyl)carbamyl]pyridine-6-carboxylate (H1), prepared by reaction of a 1:1 ratio of the methyl diester of pyridine-2,6-dicarboxylic acid and 2-aminomethylpyridine, can form 1:2 M:L complexes by acting as a tridentate ligand, as exemplified by a crystal structure analysis of [CoIII(1)2](ClO4) where each ligand is coordinated by the amido group and its two flanking pyridine groups, with the ester group, a relatively poor donor, remaining unbound. The acid formed upon ester hydrolysis, hydrogen 2-[N-(2′-pyridylmethyl)carbamyl]pyridine-6-carboxylate (H22), has been isolated

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8

Ghalia, Mohamed H., Mohamed Abd El-Hamid, Mohamed A. Zweil, Abd El-Galil E. Amr, and Shimaa A. Moafi. "Synthesis and Reactions of New Chiral Linear and Macrocyclic Tetraand Penta-peptide Candidates." Zeitschrift für Naturforschung B 67, no. 8 (2012): 806–18. http://dx.doi.org/10.5560/znb.2012-0116.

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9a A series of linear and macrocyclic pentapeptide derivatives have been prepared via the coupling of pyridine-2,6-dicarboxylic acid (1) or pyridine-2,6-dicarbonyl dichloride (2) with appropriate amino acid methyl esters. The coupling of 1or 2with aminoacid methyl esters gave the corresponding pyridine dipeptide methyl esters 3, which were hydrolyzed with sodium hydroxide to the corresponding acids 4. The latter compounds 4were coupled with other amino acid methyl esters to afford the corresponding tetrapeptide esters 5, which were hydrolyzed with sodium hydroxide to the corresponding acids 6.

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9

Liu, Haixing, and Ying Liu. "Study on a structure of pyridine-2, 6-dicarboxylic acid calcium boric acid hydrate, C7H16BCaNO12." IOP Conference Series: Earth and Environmental Science 769, no. 2 (2021): 022061. http://dx.doi.org/10.1088/1755-1315/769/2/022061.

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10

Park, Hyunjin, Myong Yong Choi, Cheol Joo Moon, and Tae Ho Kim. "Crystal structure ofN-[2-(cyclohexylsulfanyl)ethyl]quinolinic acid imide." Acta Crystallographica Section E Crystallographic Communications 73, no. 9 (2017): 1372–74. http://dx.doi.org/10.1107/s2056989017012142.

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The title compound, C15H18N2O2S {systematic name: 6-[2-(cyclohexylsulfanyl)ethyl]-5H-pyrrolo[3,4-b]pyridine-5,7(6H)-dione}, was obtained from the reaction of pyridine-2,3-dicarboxylic anhydride (synonym: quinolinic anhydride) with 2-(cyclohexylsulfanyl)ethylamine. The dihedral angle between the mean plane of the cyclohexyl ring and the quinolinic acid imide ring is 25.43 (11)°. In the crystal, each molecule forms two C—H...O hydrogen bonds and one weak C—O...π [O...ring centroid = 3.255 (2) Å] interaction with neighbouring molecules to generate a ladder structure along theb-axis direction. The

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11

Koch, Daniela, Karlheinz Sünkel, and Wolfgang Beck. "Metallkomplexe mit biologisch wichtigen Liganden, CXI. Phosphan-Gold(I), -Nickel(II) und -Platin(II) Komplexe mit dem Anion von Hydantoin und 3,4-Pyridindicarbonsäureimid/Metal Complexes of Biologically Important Ligands, CXI. Phosphine Gold(I), Nickel(II) and Platinum(II) Complexes with the Anion of Hydantoin and of 3,4 Pyridine Dicarboxylic Imide." Zeitschrift für Naturforschung B 54, no. 1 (1999): 96–102. http://dx.doi.org/10.1515/znb-1999-0118.

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The anions of hydantoin (L1) and of the imide of 3,4-pyridine dicarboxylic acid (L2) form the complexes Ph3PAu(L1-H+) (1), Ph3PAu(L2-H+) (2), (nBu3P)2Ni(L1-H+)2 (3) and the ligand bridged compounds Ph3PAu(L2-H+)M(PEt3)Cl2 (M = Pd, Pt, 4, 5). With the neutral ligand L2 the complexes Cp*Ir(Cl)2(L2) (6), (ρ-cymene)Ru(Cl)2 (L2) (7) and (Et3P)(Cl)2Pd(L2) (8) were obtained. Complexes 1, 2 and 6 were characterized by X-ray diffraction.

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12

Wang, Yue, Mamiko Odoko та Nobuo Okabe. "(6-Carboxylatopyridine-2-carboxylic acid-κ2N,O)(pyridine-2,6-dicarboxylic acid-κ2N,O)silver(I) dihydrate". Acta Crystallographica Section E Structure Reports Online 60, № 8 (2004): m1178—m1180. http://dx.doi.org/10.1107/s1600536804018033.

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13

G., S. Sanyal, Ganguly R., K. Nath P., and J. Butcher R. "Crystal structure of iron(III) complex with pyridine-2,6-dicarboxylic acid." Journal of Indian Chemical Society Vol. 79, Jun 2002 (2002): 489–91. https://doi.org/10.5281/zenodo.5843315.

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Department of Chemistry, University of Kalyani, Kalyani-741 235, India <em>E-mail : </em>rakesh_ganguly@yahoo.com                         <em>Fax : </em>91-033-5828282 Department of Chemistry, Howard University, Washington, D.C. 20059, U.S.A. <em>Manuscript received 6 April 2001, revised 29 August 2001, accepted 15 September 2001</em> Complex of Fe<sup>III</sup> with pyridine-2,6-dicarboxylic acid has been synthesized. The ligand acts as tridentate coordinating through t

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14

Yuste, Consuelo, Manuela Ramos Silva, Mohammad Ghadermazi, Fariba Feizi, and Elham Motieiyan. "Phenylhydrazinium (6-carboxypyridine-2-carboxylato)(pyridine-2,6-dicarboxylato)cobaltate(II)–pyridine-2,6-dicarboxylic acid–water (1/1/3)." Acta Crystallographica Section E Structure Reports Online 66, no. 12 (2010): m1643—m1644. http://dx.doi.org/10.1107/s1600536810048191.

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15

Rza¸lzyńSka, Z., W. Brzyska, R. Mrozek, W. Ozga, and T. Glowiak. "The crystal structures of two neodymium(iii) complexes with pyridine‐2, 6‐dicarboxylic acid." Journal of Coordination Chemistry 43, no. 4 (1998): 321–34. http://dx.doi.org/10.1080/00958979808230445.

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16

Khushbu, K. Mehta, S. Chandra Raviprakash, R. Mehta Dhruvi, and M. Maisuria M. "Thermodynamic studies on metal complexes of Cd2+, Ni2+, Cu2+ and Co2+ with pyridine-2,6-dicarboxylic acid in water, methanol and water-methanol binary solvent systems at 298.15, 308.15 and 318.15 K by conductometric method." Chemistry International 4, no. 1 (2018): 33–42. https://doi.org/10.5281/zenodo.1475327.

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Stability constants are measured for complexes of Cd2+, Ni2+, Cu2+ and Co2+ with pyridine-2,6-dicarboxylic acid(PDA) in water, methanol and water-methanol binary solvent systems at 298.15, 308.15 and 318.15 K by conductometric method. The result shows that the stoichiometry of the complexes of PDA with all metals in all binary solvent systems is 1:2 [ML2]. The logKf values of PDA-M2+ complexes in H2O-MeOH binary solvent systems increase with increasing % of MeOH and temperature. The ΔH0 and ΔS0 of the complexation reaction in the different H2O-MeOH binary solvent systems were evalu

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17

Hakimi, Mohammad, Fereshteh Sadeghi, Nourollah Feizi, Keyvan Moeini, Monika Kučeráková, and Michal Dušek. "Investigation of the effect of the N-oxidation process on the interaction of selected pyridine compounds with biomacromolecules: structural, spectral, theoretical and docking studies." Acta Crystallographica Section C Structural Chemistry 75, no. 6 (2019): 750–57. http://dx.doi.org/10.1107/s2053229619006375.

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Two new N-oxide compounds, namely glycinium 2-carboxy-1-(λ1-oxidaneyl)-1λ4-pyridine-6-carboxylate–glycine–water (1/1/1), C2H6NO2 +·C7H4NO5 −·C2H5NO2·H2O or [(2,6-HpydcO)(HGLY)(GLY)(H2O)], 1, and methyl 6-carboxy-1-(λ1-oxidaneyl)-1λ4-pyridine-2-carboxylate, C8H7NO5 or 2,6-HMepydcO, 2, were prepared and identified by elemental analysis, FT–IR, Raman spectroscopy and single-crystal X-ray diffraction. The X-ray analysis of 1 revealed an ionic compound containing a 2,6-HpydcO− anion, a glycinium cation, a neutral glycine molecule and a water molecule. Compound 2 is a neutral compound with two indep

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18

Du, Rui-Zhi, Yan-Yan Wang, Yu-Yu Xie, Hao-Tian Li, and Tian-Fu Liu. "Synthesis and crystal structure of new lanthanide coordination polymers with Pyridine-2, 6-dicarboxylic acid." Journal of Molecular Structure 1108 (March 2016): 96–102. http://dx.doi.org/10.1016/j.molstruc.2015.11.070.

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19

Moghzi, Faezeh, Janet Soleimannejad, Hamid Emadi, and Jan Janczak. "0D to 3D PrIII metal–organic networks crystal engineered for optimal iodine adsorption." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 76, no. 5 (2020): 779–88. http://dx.doi.org/10.1107/s2052520620009336.

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Four new praseodymium(III) metal–organic compounds varying in dimensionality from 0D to 3D have been designed and synthesized based on N-heterocyclic polycarboxylic acids, including pyridine-2,6-dicarboxylic acid (H2pydc) and pyrazine-2,3-dicarboxylic acid (H2pzdc). Altering the concentration of piperazine (pip, ancillary ligand) enables control over the dimensionality of the compound by switching between the 0D [H2pip][Hpip][Pr(pydc)3]·4H2O (I) and the 1D {[Pr(pydc)(Hpydc)(H2O)2]·4H2O} n (II) coordination polymer (CP). Upon replacing H2pydc with H2pzdc, CP II is converted to the 2D CP [Pr(pzd

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20

Soleimannejad, Janet, Hossein Aghabozorg, Elham Motyeian, Mohammad Ghadermazi, Jafar Attar Gharamaleki, and Harry Adams. "Propane-1,3-diaminium–2-carboxypyridine-6-carboxylate–pyridine-2,6-dicarboxylic acid–water (1/2/2/8)." Acta Crystallographica Section E Structure Reports Online 64, no. 1 (2007): o231—o232. http://dx.doi.org/10.1107/s1600536807065270.

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21

Dumond, Yves, and Andrew Gum. "Silane Reduction of 5-Hydroxy-6-methyl-pyridine-3,4-dicarboxylic Acid Diethyl Ester: Synthesis of Vitamin B6." Molecules 8, no. 12 (2003): 873–81. http://dx.doi.org/10.3390/81200873.

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22

Sharma, Vinita, Katsuhiko Hosoi, Tamio Mori, and Shin-ichi Kuroda. "Effects of Cold Atmospheric Pressure Plasma Jeton the Viability of Bacillus subtilis Endospores." Advanced Materials Research 647 (January 2013): 524–31. http://dx.doi.org/10.4028/www.scientific.net/amr.647.524.

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In this study, we conducted experiments to investigate the effectiveness of a non-equilibrium Ar-N2 plasma jet generated by a Cold Atmospheric Pressure Plasma Torch (CAPPLAT) at a sinusoidal voltage of 20 kV, frequency of 30 kHz with 10 slm of Ar gas and 100 sccm of N2 gas. Highly environmental stress resistant bacterial endospores of Bacillus subtilis, dried on an agar disc were exposed to the plasma discharge from the CAPPLAT for different durations. The viability of spores after plasma exposure was checked by counting CFUs by serial dilution method. We also measured the amount of released D

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23

Xu, Wenguang, Yajuan Ye, Kang Yan, et al. "Synthesis and Fluorescent Sensing Properties for Ce3+ Ions of Di-Schiff Base Amine Containing Amaide Bridge Probe." Journal of Physics: Conference Series 2610, no. 1 (2023): 012067. http://dx.doi.org/10.1088/1742-6596/2610/1/012067.

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Abstract A fluorescent probe (L) of di-Schiff base amine ligand was designed and synthesized from 2,6-pyridine-dicarboxylic acid, ethylenediamine and p-hydroxybenzaldehyde by condensation reaction and reduction reaction. The structure was confirmed by means of IR, UV, 1H NMR and MS. The research of fluorescence spectroscopy indicated that the probe L exhibited high selectivity for Ce3+. The spectroscopic titration indicated that A good linear work curve with R2 = 0.99607, the stoichiometry of the Ce3+ complex was 1:1, the minimum detection limits for Ce3+was 3.8382×10-6 mol/L and the binding c

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24

Borisova, Nataliya E., Alexey V. Ivanov, Anastasia V. Kharcheva, et al. "Effect of Heterocyclic Ring on LnIII Coordination, Luminescence and Extraction of Diamides of 2,2′-Bipyridyl-6,6′-Dicarboxylic Acid." Molecules 25, no. 1 (2019): 62. http://dx.doi.org/10.3390/molecules25010062.

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We have synthesized and examined several complexes of lanthanides with diamides of 2,2′-bipyridyl-6,6′-dicarboxylic acid bearing various hetaryl-based side chains for the elucidation of the effect of the heterocycle on the structure and properties of the ligands. The multigram scale methods for the preparation of various N-alkyl-hetaryls and their diamides were developed. The solid state structure of 6-methyl-2-pyridylamide of 2,2′-bipyridyl-6,6′-dicarboxylic acid possesses a flat structure where the conformation is completely different from that previously observed for N-alkylated 2,2′-bipyri

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25

Tutughamiarso, Maya, Thorsten Pisternick, and Ernst Egert. "Pseudopolymorphs of chelidamic acid and its dimethyl ester." Acta Crystallographica Section C Crystal Structure Communications 68, no. 9 (2012): o344—o350. http://dx.doi.org/10.1107/s0108270112031691.

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Different tautomeric and zwitterionic forms of chelidamic acid (4-hydroxypyridine-2,6-dicarboxylic acid) are present in the crystal structures of chelidamic acid methanol monosolvate, C7H5NO5·CH4O, (Ia), dimethylammonium chelidamate (dimethylammonium 6-carboxy-4-hydroxypyridine-2-carboxylate), C2H8N+·C7H4NO5−, (Ib), and chelidamic acid dimethyl sulfoxide monosolvate, C7H5NO5·C2H6OS, (Ic). While the zwitterionic pyridinium carboxylate in (Ia) can be explained from the pKavalues, a (partially) deprotonated hydroxy group in the presence of a neutral carboxy group, as observed in (Ib) and (Ic), is

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Ru, Jing, Yi-Xuan Shi, Qing-Yun Yang, et al. "A Benzothiadiazole-Based Zn(II) Metal–Organic Framework with Visual Turn-on Sensing for Anthrax Biomarker and Theoretical Calculation." Molecules 29, no. 12 (2024): 2755. http://dx.doi.org/10.3390/molecules29122755.

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2,6-pyridine dicarboxylic acid (DPA) is an exceptional biomarker of notorious anthrax spores. Therefore, the rapid, sensitive, and selective quantitative detection of DPA is extremely significant and urgent. This paper reports a Zn(II) metal–organic framework with the formula of {[Zn6(NDA)6(DPBT)3] 2H2O·3DMF}n (MOF-1), which consists of 2,6-naphthalenedicarboxylic acid (2,6-NDA), 4,7-di(4-pyridyl)-2,1,3-benzothiadiazole (DPBT), and Zn(II) ions. Structural analysis indicated that MOF-1 is a three-dimensional (3D) network which crystallized in the monoclinic system with the C2/c space group, rev

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Krishna, Srivastava, Prakash Ved, and Prasad Jagdish. "Cyclic voltammetric studies of oxovanadium(IV) complex with 2,6-pyridinedicarboxylic acid in aqueous medium." Journal of Indian Chemical Society Vol. 86, Aug 2009 (2009): 867–68. https://doi.org/10.5281/zenodo.5819412.

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Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India <em>E-mail</em> : dr_krishna_s@yahoo.co.in <em>Manuscript received 23 April 2008. revised 19 March 2009. accepted 27 April 2009</em> The cyclic voltammetric behaviour of mononuclear oxovanadium(IV) complex with 2,6-pyridinedicarboxylic acid (Hldipic), [VO(dipic)(H<sub>2</sub>O)<sub>2</sub>] has been studied at GCE working electrode in aqueous 0.2 <em>M</em> NaCIO<sub>4</sub> and 0.2 <em>M</em> KCI as supporting electrolytes at initial pH 4.25. [VO(dipic)(H<sub>2</sub>O)<sub>2</sub>] complex undergoes diff

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Sanotra, Sumit, Rimpy Gupta, Haq Nawaz Sheikh, Bansi Lal Kalsotra, Vivek K. Gupta та Rajnikant. "Hydrothermal synthesis and crystal structure of novel bis(6-carboxypyridine-2-carboxylato-κ3 O 2,N,O 6)nickel(II) trihydrate, Ni(Hpydc)2·3H2O". Acta Crystallographica Section B Structural Science 68, № 6 (2012): 619–24. http://dx.doi.org/10.1107/s0108768112043972.

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The synthesis and crystal structure of the compound bis(6-carboxypyridine-2-carboxylato-κ3 O 2,N,O 6)nickel(II) trihydrate, Ni(Hpydc)2·3H2O, with a supramolecular network is reported (H2pydc is pyridine-2,6-dicarboxylic acid). The compound has been prepared by hydrothermal methods. The crystal structure has been solved by direct methods using single-crystal X-ray diffraction data collected at 293 K and refined by full-matrix least-squares procedures to a final R value of 0.0323 for 2779 observed reflections. The compound has distorted octahedral geometry around the metal centre. The complex co

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Wang, Yi, and Helen Stoeckli-Evans. "The inner-salt zwitterion, the dihydrochloride dihydrate and the dimethyl sulfoxide disolvate of 3,6-bis(pyridin-2-yl)pyrazine-2,5-dicarboxylic acid." Acta Crystallographica Section C Crystal Structure Communications 68, no. 11 (2012): o431—o435. http://dx.doi.org/10.1107/s0108270112039534.

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In the inner-salt zwitterion of 3,6-bis(pyridin-2-yl)pyrazine-2,5-dicarboxylic acid, (I), namely 5-carboxy-3-(pyridin-1-ium-2-yl)-6-(pyridin-2-yl)pyrazine-2-carboxylate, [C16H10N4O4, (Ia)], the pyrazine ring has a twist–boat conformation. The opposing pyridine and pyridinium rings are almost perpendicular to one another, with a dihedral angle of 80.24 (18)°, and are inclined to the pyrazine mean plane by 36.83 (17) and 43.74 (17)°, respectively. The carboxy and carboxylate groups are inclined to the mean plane of the pyrazine ring by 43.60 (17) and 45.46 (17)°, respectively. In the crystal str

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30

Fu, Ai-Yun, Da-Qi Wang, and Cun-Lan Zhang. "1,10-Phenanthrolinium–6-carboxypyridine-2-carboxylate–1,10-phenanthroline–pyridine-2,6-dicarboxylic acid–ethanol–water (1/1/1/1/1/1)." Acta Crystallographica Section E Structure Reports Online 61, no. 10 (2005): o3119—o3121. http://dx.doi.org/10.1107/s1600536805027236.

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Guin, M., M. Afzal, B. Jana, S. Halder, S. Chatterjee, and S. Konar. "Co(II) Coordination Compound: Structural and Computational Insights via Crystal Structure, DFT, MEP, NBO and Hirshfeld surface Analyses." Журнал структурной химии 65, no. 9 (2024): 134968. http://dx.doi.org/10.26902/jsc_id134968.

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A new coordination compound of Co(II) [Co(pydc)2](pydcH2)(Hapy)(H2O)5 (1) (where, pydcH2 = pyridine-2,6-dicarboxylic acid; Hapy = protonated 2- aminopyridine)wassynthesized and characterizedby single crystal X-ray diffraction (SC-XRD) analyses. Crystallographic analysis (CIF file CCDC no. 2236169) revealed that complex 1 has distorted octahedral geometry with pydc coordinated as a tridentate ligand to a metal ion. The electronic structure of the complex was determined using DFT calculations with pseudo potential of LANL2DZ basis function for Cobalt atom while B3LYP/GEN level using 6-31+G* basi

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Dimakopoulou, Foteini, Costantinos G. Efthymiou, Ciaran O’Malley, et al. "Novel Co5 and Ni4 Metal Complexes and Ferromagnets by the Combination of 2-Pyridyl Oximes with Polycarboxylic Ligands." Molecules 27, no. 15 (2022): 4701. http://dx.doi.org/10.3390/molecules27154701.

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The use of 2-pyridyl oximes in metal complexes chemistry has been extensively investigated in the last few decades as a fruitful source of species with interesting magnetic properties. In this work, the initial combination of pyridine-2-amidoxime (pyaoxH2) and 2-methyl pyridyl ketoxime (mpkoH) with isonicotinic acid (HINA) and 3,5-pyrazole dicarboxylic acid (H3pdc) has provided access to three new compounds, [Ni4(INA)2(pyaox)2(pyaoxH)2(DMF)2] (1), [Co5(mpko)6(mpkoH)2(OMe)2(H2O)](ClO4)6 (2), and [Co5(OH)(Hpdc)5(H2pdc)] (3). 1 displays a square-planar metal topology, being the first example that

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Lin, Hong-Yan, Peng Liu, Xiu-Li Wang, Chuang Xu, and Guo-Cheng Liu. "Syntheses, Structures and Electrochemical Properties of Two New Copper(II) Complexes Based on Isomeric Bis(pyridylformyl)piperazine Ligands and Rigid=Flexible Organic Dicarboxylates." Zeitschrift für Naturforschung B 68, no. 2 (2013): 138–46. http://dx.doi.org/10.5560/znb.2013-2291.

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Two new copper(II) complexes, [Cu2(3-bpfp)(2,6-PDA)2(H2O)2] (1) and [Cu(4-bpfp)0:5 (glu)]·H2O (2), have been hydrothermally synthesized by self-assembly of isomeric bis(pyridylformyl)piperazine ligands [3-bpfp=bis(3-pyridylformyl)piperazine, 4-bpfp=bis(4- pyridylformyl)piperazine], rigid pyridine-2,6-dicarboxylic acid (2,6-H2PDA) or flexible glutaric acid (H2glu), and copper(II) chloride. Single-crystal X-ray diffraction analysis reveals that two adjacent CuII ions are connected by the 3-bpfp ligand to build a dinuclear unit in complex 1, in which 2,6-PDA serves as a terminal chelating ligand.

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34

ROSSOLINI, Gian Maria, Nicola FRANCESCHINI, Maria Letizia RICCIO та ін. "Characterization and sequence of the Chryseobacterium (Flavobacterium) meningosepticum carbapenemase: a new molecular class B β-lactamase showing a broad substrate profile". Biochemical Journal 332, № 1 (1998): 145–52. http://dx.doi.org/10.1042/bj3320145.

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The metallo-β-lactamase produced by Chryseobacterium(formerly Flavobacterium) meningosepticum,which is the flavobacterial species of greatest clinical relevance, was purified and characterized. The enzyme, named BlaB, contains a polypeptide with an apparent Mr of 26000, and has a pI of 8.5. It hydrolyses penicillins, cephalosporins (including cefoxitin), carbapenems and 6-β-iodopenicillanate, a mechanism-based inactivator of active-site serine β-lactamases. The enzyme was inhibited by EDTA, 1-10 phenanthroline and pyridine-2,6-dicarboxylic acid, with different inactivation parameters for each

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35

Andriichuk, Irina L., Liudmyla V. Tsymbal, Vladimir B. Arion, and Yaroslaw D. Lampeka. "Crystal structure of trans-diaqua(1,4,8,11-tetraazaundecane)nickel(II) bis(pyridine-2,6-dicarboxylato)nickel(II)." Acta Crystallographica Section E Crystallographic Communications 77, no. 11 (2021): 1175–79. http://dx.doi.org/10.1107/s2056989021011178.

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The asymmetric unit of the title compound, trans-diaqua(1,4,8,11-tetraazaundecane-κ4 N 1,N 4,N 8,N 11)nickel(II) bis(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)nickel(II) {[Ni(L)(H2O)2][Ni(pdc)2] where L = 1,4,8,11-tetraazaundecane (C7H20N4) and pdc = the dianion of pyridine-2,6-dicarboxylic acid (C7H3NO4 2−)} consists of an [Ni(L)(H2O)2]2+ complex cation and a [Ni(pdc)2]2– anion. The metal ion in the cation is coordinated by the four N atoms of the tetraamine ligand and the mutually trans O atoms of the water molecules in a tetragonally elongated octahedral geometry with the average equatorial N

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36

Amereih, Sameer, Thomas Meisel, and Wolfhard Wegsheider. "Accurate Determination of Total Antimony Using ICP-MS and Optimization Its Extraction Efficiency From Reference and Soil Samples." مجلة جامعة فلسطين التقنية للأبحاث 6, no. 1 (2018): 48–58. http://dx.doi.org/10.53671/pturj.v6i1.56.

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Two independent digestion techniques (microwave acid digestion with HF and HCl, HNO3 and Na2O2 sintering, respectively) were applied to determine the total Sb concentration in a real soil sample and in reference materials: Icelandic Basalt (BIR-1), Cody Shale (SCo-1) and (Soil-7). ICP-MS was used to determine total antimony concentrations in the digested and the extracted solutions using external calibration and isotope dilution technique. The recoveries of Sb using HF in the acids digestion mixture in closed-vessels microwave digestion system were excellent and the concentrations are in very

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Amereih, Sameer, Thomas Meisel, and Wolfhard Wegsheider. "Accurate Determination of Total Antimony Using ICP-MS and Optimization Its Extraction Efficiency From Reference and Soil Samples." مجلة جامعة فلسطين التقنية خضوري للأبحاث 6, no. 1 (2018): 48–58. http://dx.doi.org/10.53671/ptukrj.v6i1.56.

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Two independent digestion techniques (microwave acid digestion with HF and HCl, HNO3 and Na2O2 sintering, respectively) were applied to determine the total Sb concentration in a real soil sample and in reference materials: Icelandic Basalt (BIR-1), Cody Shale (SCo-1) and (Soil-7). ICP-MS was used to determine total antimony concentrations in the digested and the extracted solutions using external calibration and isotope dilution technique. The recoveries of Sb using HF in the acids digestion mixture in closed-vessels microwave digestion system were excellent and the concentrations are in very

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Sung, Ki-Wug, Sukwoo Choi, and David M. Lovinger. "Activation of Group I mGluRs Is Necessary for Induction of Long-Term Depression at Striatal Synapses." Journal of Neurophysiology 86, no. 5 (2001): 2405–12. http://dx.doi.org/10.1152/jn.2001.86.5.2405.

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Activation of metabotropic glutamate receptors (mGluRs), which are coupled to G proteins, has important roles in certain forms of synaptic plasticity including corticostriatal long-term depression (LTD). In the present study, extracellular field potential and whole cell voltage-clamp recording techniques were used to investigate the effect of mGluR antagonists with different subtype specificity on high-frequency stimulation (HFS)-induced LTD of synaptic transmission in the striatum of brain slices obtained from 15-to 25-day-old rats. Induction of LTD was prevented during exposure to the nonsel

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Buvailo, Halyna I., Julia A. Rusanova, Valeriya G. Makhankova, Vladimir N. Kokozay та Roman I. Zubatyuk. "Chloridobis(1,10-phenanthroline-κ2N,N′)copper(II) chlorido(1,10-phenanthroline-κ2N,N′)(pyridine-2,6-dicarboxylato-κ3O2,N,O6)manganate(II) methanol monosolvate". Acta Crystallographica Section E Structure Reports Online 70, № 4 (2014): m147—m148. http://dx.doi.org/10.1107/s1600536814006369.

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The title complex, [CuCl(C12H8N2)2][Mn(C7H3NO4)Cl(C12H8N2)]·CH3OH, consists of discrete [CuCl(phen)2]+cations (phen is 1,10-phenanthroline), [MnCl(pydc)(phen)]−anions (H2pydc is 2,6-pyridine-2,6-dicarboxylic acid) and one methanol solvent molecule of crystallization per asymmetric unit. It should be noted, that a solvent-masking procedure as implemented inOLEX2[Dolomanovet al.(2009).J. Appl. Cryst.42, 339–341] was used to remove the electronic contribution from one disordered solvent molecule, presumably methanol. Only the atoms used in the refined model are reported in chemical formula and re

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40

Sundheim, Angelika, and Rainer Mattes. "Reaktionen von Oxovanadium-Dipicolinatokomplexen mit Benzoylhydrazin. Die Kristallstrukturen von [VO(dipic)(NH2NHC(O)Ph) · NH2NHC(O)Ph · H2O, [C(NH2)3][VO(dipic)(NHNC(O)Ph)] · 2H2O und der „blauen“ Modifikation von [VO(dipic)(H2O)2] · 2H2O / Reactions of Oxovanadium(IV) and -(V) Dipicolinato Complexes with Benzoylhydrazine. Crystal Structures of [VO(dipic)(NH2NHC(O)Ph)] · NH2NHC(O)Ph · H2O · [C(NH2)3][VO(dipic)(NHNC(0)Ph)] · 2H 2O and the “Blue” Modification of [VO(dipic)(H2O) 2] · 2 H2O." Zeitschrift für Naturforschung B 48, no. 2 (1993): 125–32. http://dx.doi.org/10.1515/znb-1993-0202.

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AbstractThe hydrazino complex [VO(dipic)(NH2NHC(O)Ph)] · NH2NHC(O)Ph · H2O (3) has been prepared by reaction of [VO(dipic)(H2O)] · 2H2O (1) with NH2NHC(O)Ph. (dipic = dianion of pyridine dicarboxylic acid). The hydrazido(2-) complex (guanid)[VO(dipic)(NHNC(O)Ph)] · 2H2O (4) was obtained by reaction of (guanid)[VO2(dipic)]·2H2O and NH2NHC(O)Ph. During the course of this reaction a terminally bonded oxygen atom is abstracted from the vanadium(V) center. 1, 3 and 4 have been characterized by X-ray single crystal diffraction, infrared, Raman and electron spin resonance spectroscopy.In 1 vanadium i

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Reddy, Pulikanti Guruprasad, Narsimha Mamidi, and Chullikkattil P. Pradeep. "An organic–inorganic hybrid supramolecular framework material based on a [P2W18O62]6−cluster and Yb & Na complexes of pyridine-2,6-dicarboxylic acid: a catalyst for selective oxidation of sulfides in water with H2O2." CrystEngComm 18, no. 23 (2016): 4272–76. http://dx.doi.org/10.1039/c5ce02546j.

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42

Jung, Albert S., Michael P. Quaile, Geoffrey D. Mills, Daniel P. Bednarik, Steven R. Houser, and Kenneth B. Margulies. "Pharmacological Effects of ATI22-107 [2-(2-{2-[2-Chloro-4-(6-oxo-1,4,5,6-tetrahydro-pyridazin-3-yl)-phenoxy]-acetylamino}-ethoxymethyl)-4-(2-chloro-phenyl)-6-methyl-1,4-dihydro-pyridine-3,5-dicarboxylic Acid Dimethyl Ester)], a Novel Dual Pharmacophore, on Myocyte Calcium Cycling and Contractility." Journal of Pharmacology and Experimental Therapeutics 312, no. 2 (2004): 517–24. http://dx.doi.org/10.1124/jpet.104.075895.

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43

Zhang, M. S., B. W. Sun, R. B. Fang, and Q. H. Zhao. "Crystal structure and thermal properties of novel Co(II) complexes with 2,6-pyridine-dicarboxylate containing infinite one-dimensional chain: [CoL1(H2O)4][Co(pydc)2]·2H2O and [Co(H2O)6]×[Co(pydc)2]L2·H2O (L1 = 1,3-bis(4-pyridyl)propane, L2 = 3-amino-1H-1,2,4-triazole, pydc = 2,6-pyridine-dicarboxylic acid)." Journal of Structural Chemistry 51, no. 6 (2010): 1145–51. http://dx.doi.org/10.1007/s10947-010-0174-0.

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44

G., S. Sanyal, Ganguly R., K. Nath P., and J. Butcher R. "Synthesis and crystal structure of cobalt(III) complexes with pyrazine-2,6- and pyridine-2,6-dicarboxylic acids." Journal of Indian Chemical Society Vol. 79, May 2002 (2002): 458–61. https://doi.org/10.5281/zenodo.5843158.

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Department of Chemistry, University of Kalyani, Kalyani-741 235, India <em>E-mail : </em>rakesh_ganguly@yahoo.com                                 <em>Fax : </em>91-33-5828282 Department of Chemistry, Howard University, Washington, D.C. 20059, U.S.A. <em>Manuscript received 27 April 2001, accepted 6 October 2001</em> Complexes of Co<sup>III</sup> with pyrazine-2,6- and pyridine-2,6-dicarboxylic acids have been synthesized. The ligan

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45

Zhao, Xiaoya, Boya Su, Qian Zhao, et al. "Construction of pyridine-functionalized metal–organic frameworks for the detection of flazasulfuron." Acta Crystallographica Section C Structural Chemistry 80, no. 12 (2024): 806–14. http://dx.doi.org/10.1107/s2053229624011082.

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Two novel Cu-based metal–organic frameworks (MOFs), namely, poly[[aquadichlorido[μ4-4′-(pyridin-4-yl)-[2,2′:6′,2′′-terpyridine]-4,4′′-dicarboxylato][μ3-4′-(pyridin-4-yl)-[2,2′:6′,2′′-terpyridine]-4,4′′-dicarboxylato]tricopper(II)] monohydrate], {[Cu3(C22H12N4O4)2Cl2(H2O)]·H2O} n or {[Cu3(PTP)2Cl2(H2O)]·H2O} n , (I), and poly[[diaquabis[μ2-4′-(pyridin-3-yl)-[2,2′:6′,2′′-terpyridine]-4,4′′-dicarboxylato]bis(μ2-terephthalato)tricopper(II)] dihydrate], {[Cu3(C22H12N4O4)2(C8H4O4)2(H2O)2]·2H2O} n or {[Cu3(BDC)2(MTP)2(H2O)2]·2H2O} n , (II), have been synthesized successfully with 4′-(pyridin-4-yl)-[2

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46

Wei-Wei, Yang, Di You-Ying, Kong Yu-Xia, and Tan Zhi-Cheng. "Low-temperature heat capacities and standard molar enthalpy of formation of pyridine-2,6-dicarboxylic acid." Chinese Physics B 19, no. 6 (2010): 060517. http://dx.doi.org/10.1088/1674-1056/19/6/060517.

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47

Wang, Dong-E., Zheng-Fang Tian, Feng Wang, Li-Li Wen, and Dong-Feng Li. "Syntheses and Crystal Structures of Two Inorganic–Organic Hybrid Frameworks Constructed from Pyridine-2,5-Dicarboxylic Acid." Journal of Inorganic and Organometallic Polymers and Materials 19, no. 2 (2009): 196–201. http://dx.doi.org/10.1007/s10904-008-9244-6.

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48

Jasoda, Behera, S. Brahma G., and Mohanty Prakash. "Kinetics and mechanism of the reaction of aquachromium(III) with pyridine-3-carboxylic and pyridine-2,6-dicarboxylic acid : A comparative study." Journal of Indian Chemical Society Vol. 78, Mar 2001 (2001): 123–26. https://doi.org/10.5281/zenodo.5849530.

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Department of Chemistry, Utkal University, Vani Vihar, Bhubaneswar-751 004, India <em>Fax : </em>91-0674-581850 <em>Manuscript received 28 October 1999, revised 28 July 2000, accepted 20 November 2000</em> Kinetics of the reactions of pyridine carboxylic acids with aquachromium(III) at 35° have been studied spectrophotometrically as a function of [Cr<sup>III</sup>]<sub>T</sub>, [pyridine carboxylic acidl<sub>T </sub>pH and dielectric constant of the medium. The reaction has been monitored at 570 nm. The reaction takes place via an outer-sphere association between Cr<sup>III 

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49

Butsch, Katharina, Aaron Sandleben, Maryam Heydari Dokoohaki, Amin Reza Zolghadr, and Axel Klein. "Pyridine-2,6-Dicarboxylic Acid Esters (pydicR2) as O,N,O-Pincer Ligands in CuII Complexes." Inorganics 7, no. 4 (2019): 53. http://dx.doi.org/10.3390/inorganics7040053.

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The pyridine-2,6-carboxylic esters pydicR2 with R = Me or Ph form the unprecedented mononuclear CuII complexes [Cu(pydicR2)Cl3]− in one-pot reactions starting from pyridine-2,6-carboxychloride pydicCl2, CuII chloride, and NEt3 in MeOH or PhOH solution under non-aqueous conditions. The triethylammonium salts (HNEt3)[Cu(pydicR2)Cl3] were isolated. The methyl derivative could be crystallized to allow a XRD structure determination. Both structures were optimized using DFT calculations in various surroundings ranging from gas phase and the non-coordinating solvent CH2Cl2 to the weakly coordinating

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50

Bates, MRM, TJ Cardwell, RW Cattrall, LW Deady, and K. Murphy. "Studies on Cation Selectivities of Some Pyridine-Based Ionophores for Use in Polymer Membrane Chemical Sensors." Australian Journal of Chemistry 44, no. 11 (1991): 1603. http://dx.doi.org/10.1071/ch9911603.

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The synthesis of some macrocyclic compounds based on 4-octyloxypyridine-2,6-dicarboxylic acid, containing sulfur and/or oxygen atoms in the 2 to 6-bridging unit, along with some non-cyclic analogues is reported. These were tested for cation selectivity in poly(vinyl chloride)-based membrane electrodes. Little selectivity was found for any ion with the oxygen-containing compounds, and none approached the selectivity for potassium reported previously for a related compound. High bonding affinities for class b acceptors, particularly Ag+ and Hg2+, were found for sulfur-containing compounds. The c

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