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Artículos de revistas sobre el tema "Homochiral complex"

Autor: Grafiati
Publicado: 21 de diciembre de 2024
Última modificación: 31 de julio de 2025

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1

Liu, Yu-Ling, Jia-Zhen Ge, Zhong-Xia Wang, and Ren-Gen Xiong. "Metal–organic ferroelectric complexes: enantiomer directional induction achieved above-room-temperature homochiral molecular ferroelectrics." Inorganic Chemistry Frontiers 7, no. 1 (2020): 128–33. http://dx.doi.org/10.1039/c9qi01197h.

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2

Colquhoun, Howard M., C. Timothy Powell, Zhixue Zhu, et al. "Enantiospecific Assembly of a Homochiral, Hexanuclear Palladium Complex." European Journal of Inorganic Chemistry 2009, no. 8 (2009): 999–1002. http://dx.doi.org/10.1002/ejic.200801045.

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3

Jiao, Luyang, Mengying Du, Yameng Hou, Yuan Ma, and Xianglei Kong. "Homochiral or Heterochiral: A Systematic Study of Threonine Clusters Using a FT ICR Mass Spectrometer." Symmetry 14, no. 1 (2022): 86. http://dx.doi.org/10.3390/sym14010086.

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The strong chiral preferences of some magic clusters of amino acids have attracted continually increasing interests due to their unique structures, properties and possible roles in homochirogenesis. However, how chirality can influence the generation and stability of cluster ions in a wild range of cluster sizes is still unknown for most amino acids. In this study, the preference for threonine clusters to form homochiral and heterochiral complex ions has been investigated by electrospray ionization (ESI) mass spectrometry. Abundant cluster [Thrn+mH]m+ ions (7 ≤ n ≤ 78, 1 ≤ m ≤ 5) have been obs
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4

Bhattacharyya, Anik, Biswa Nath Ghosh, Santiago Herrero, Kari Rissanen, Reyes Jiménez-Aparicio, and Shouvik Chattopadhyay. "Formation of a novel ferromagnetic end-to-end cyanate bridged homochiral helical copper(ii) Schiff base complex via spontaneous symmetry breaking." Dalton Transactions 44, no. 2 (2015): 493–97. http://dx.doi.org/10.1039/c4dt03166k.

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5

Rose-Munch, Françoise, Vanessa Gagliardini, Anne Perrotey, et al. "Two-step synthesis of homochiral monoaminals of tricarbonylphthalaldehydechromium complex." Chemical Communications, no. 20 (1999): 2061–62. http://dx.doi.org/10.1039/a906043j.

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6

Fu, Da-Wei, Yu-Mei Song, Guo-Xi Wang, et al. "Dielectric Anisotropy of a Homochiral Trinuclear Nickel(II) Complex." Journal of the American Chemical Society 129, no. 17 (2007): 5346–47. http://dx.doi.org/10.1021/ja0701816.

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7

Zhang, Qichun, Xianhui Bu, Zhien Lin, Maurizio Biasini, W. P. Beyermann, and Pingyun Feng. "Metal-Complex-Decorated Homochiral Heterobimetallic Telluride Single-Stranded Helix." Inorganic Chemistry 46, no. 18 (2007): 7262–64. http://dx.doi.org/10.1021/ic701135h.

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8

Zhang, Jing, Wen Li, Weifeng Bu, Lixin Wu, Ling Ye, and Guangdi Yang. "The homochiral metallosupramolecular column structure of rhenium (I) complex." Inorganica Chimica Acta 358, no. 4 (2005): 964–70. http://dx.doi.org/10.1016/j.ica.2004.11.039.

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9

Wang, Guo-Xi, Guang-Fan Han, Qiong Ye, et al. "Dielectric anisotropy of a homochiral rare-earth metal complex." Dalton Transactions, no. 19 (2008): 2527. http://dx.doi.org/10.1039/b719580j.

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10

Roithová, Jana. "Diastereoisomeric proton-bound complexes of 1,5-diaza-cis-decalin in the gas phase." Collection of Czechoslovak Chemical Communications 74, no. 2 (2009): 243–54. http://dx.doi.org/10.1135/cccc2008185.

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Diastereoisomeric proton-bound complexes of 1,5-diaza-cis-decalin (1) with butan-2-amine (2) are studied by means of the DFT calculations and mass spectrometry. The calculations reveal that 2 is bound via proton to only one nitrogen atom of the bicyclic base 1. The homochiral complex is favored by about 4 kJ/mol over the heterochiral complex. For a more loosely bound ion-pair complex [(1H)I(2H)]+ of the protonated bases 1 and 2 with an iodine counterion the energy difference drops to about 2 kJ/mol. Chiral effects in the formation of [(1)H(2)]+ are studied by the collision-induced dissociation
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11

Weller, Michael G. "The Mystery of Homochirality on Earth." Life 14, no. 3 (2024): 341. http://dx.doi.org/10.3390/life14030341.

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Homochirality is an obvious feature of life on Earth. On the other hand, extraterrestrial samples contain largely racemic compounds. The same is true for any common organic synthesis. Therefore, it has been a perplexing puzzle for decades how these racemates could have formed enantiomerically enriched fractions as a basis for the origin of homochiral life forms. Numerous hypotheses have been put forward as to how preferentially homochiral molecules could have formed and accumulated on Earth. In this article, it is shown that homochirality of the abiotic organic pool at the time of formation of
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12

Qin, Ling, Qing Hu, Yang Wu, Jia-Le Cai, and Yun-Yun Li. "Three novel Co(ii)/Ni(ii)-based coordination polymers as efficient heterogeneous catalysts for dye degradation." CrystEngComm 20, no. 28 (2018): 4042–48. http://dx.doi.org/10.1039/c8ce00860d.

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Three novel Co(ii)/Ni(ii)-based coordination polymers have been synthesized and characterized. Compound 2 shows a rare 2D + 2D heterogeneous framework. Compound 3 is a chiral 0-D molecular complex driven by the solvent-assisted homochiral helix. The photocatalytic oxidation activities and mechanism have been studied.
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13

Kachi-Terajima, Chihiro, Megumi Ishii, Toshiaki Saito, Chikahide Kanadani, Takunori Harada, and Reiko Kuroda. "Homochiral 1D Helical Chain Based on an Achiral Cu(II) Complex." Inorganic Chemistry 51, no. 14 (2012): 7502–7. http://dx.doi.org/10.1021/ic202708e.

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14

Seo, Jongcheol, Stephan Warnke, Kevin Pagel, Michael T. Bowers, and Gert von Helden. "Infrared spectrum and structure of the homochiral serine octamer–dichloride complex." Nature Chemistry 9, no. 12 (2017): 1263–68. http://dx.doi.org/10.1038/nchem.2821.

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15

Uozumi, Yasuhiro. "Asymmetric allylic substitution of cycloalkenyl esters in water with an amphiphilic resin-supported chiral palladium complex." Pure and Applied Chemistry 79, no. 9 (2007): 1481–89. http://dx.doi.org/10.1351/pac200779091481.

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A novel homochiral phosphine ligand, (3R,9aS)[2-aryl-3-(2-diphenylphosphino)phenyl]tetrahydro-1H-imidazo[1,5-a]indole-1-one, was designed, prepared, and anchored onto an amphiphilic polystyrene-poly(ethylene glycol) copolymer (PS-PEG) resin. Catalytic asymmetric substitution of a racemic mixture of cycloalkenyl esters with carbon, nitrogen, and oxygen nucleophiles was achieved in water as the single reaction medium under heterogeneous conditions by using the PS-PEG resin-supported palladium-imidazoindole phosphine complex to give optically active substituted cycloalkenes with up to 99 % ee.
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16

Zee, Chih-Te, Calina Glynn, Marcus Gallagher-Jones, et al. "Homochiral and racemic MicroED structures of a peptide repeat from the ice-nucleation protein InaZ." IUCrJ 6, no. 2 (2019): 197–205. http://dx.doi.org/10.1107/s2052252518017621.

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The ice-nucleation protein InaZ from Pseudomonas syringae contains a large number of degenerate repeats that span more than a quarter of its sequence and include the segment GSTSTA. Ab initio structures of this repeat segment, resolved to 1.1 Å by microfocus X-ray crystallography and to 0.9 Å by the cryo-EM method MicroED, were determined from both racemic and homochiral crystals. The benefits of racemic protein crystals for structure determination by MicroED were evaluated and it was confirmed that the phase restriction introduced by crystal centrosymmetry increases the number of successful t
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17

Kachi-Terajima, Chihiro, Megumi Ishii, Toshiaki Saito, Chikahide Kanadani, Takunori Harada, and Reiko Kuroda. "Correction to Homochiral 1D Helical Chain Based on an Achiral Cu(II) Complex." Inorganic Chemistry 51, no. 15 (2012): 8636. http://dx.doi.org/10.1021/ic301427a.

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18

Lee, Seok Jong, Hye Ran Sung, Jeong-Ho Son, Rengan Ramesh, and Kyo Han Ahn. "Synthesis of a homochiral carboxylate-containing tetradentate ligand and its Co(III) complex." Inorganic Chemistry Communications 9, no. 5 (2006): 518–21. http://dx.doi.org/10.1016/j.inoche.2006.02.023.

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19

Pradeep, Chullikkattil P., Panthapally S. Zacharias, and Samar K. Das. "A Chiral Copper Complex Forms Supramolecular Homochiral Helices viaO-H···Cl-Cu Interactions." European Journal of Inorganic Chemistry 2005, no. 17 (2005): 3405–8. http://dx.doi.org/10.1002/ejic.200500261.

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20

Li, Gao, Weibin Yu, Jia Ni, et al. "Self-Assembly of a Homochiral Nanoscale Metallacycle from a Metallosalen Complex for Enantioselective Separation." Angewandte Chemie International Edition 47, no. 7 (2008): 1245–49. http://dx.doi.org/10.1002/anie.200704347.

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21

Li, Gao, Weibin Yu, Jia Ni, et al. "Self-Assembly of a Homochiral Nanoscale Metallacycle from a Metallosalen Complex for Enantioselective Separation." Angewandte Chemie 120, no. 7 (2008): 1265–69. http://dx.doi.org/10.1002/ange.200704347.

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22

Brayan, David Verdugo-Torres, Antonio Cubillos-Lobo Jairo, and Alfonso Rojas-Sarmiento Hugo. "Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst." Revista Facultad de Ingeniería –redin-, no. 89 (October 19, 2018): 73–80. https://doi.org/10.17533/udea.redin.n89a10.

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The enantioselective epoxidation of styrene using <em>in-situ </em>generated dimethyldioxiranen (DMD) and dimeric homochiral Mn(III)-Schiff base catalyst 1 has been explored. The parameters evaluated were olefin/oxidant molar ration, catalyst loading, reaction temperature and presence of nitrogen coordinating co-catalysts. Conversions of more than 99% and enantiomeric excess 66% were obtained. The selectivity is complete towards styrene oxide using 2 mol% catalyst loading, 1.36 mmol KHSO<sub>5</sub> in 8 ml of water, absence of co-catalyst and 17 &deg;C as reaction temperature. Furthermore, th
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23

Mangalath, Sreejith, Suneesh C. Karunakaran, Gary Newnam, Gary B. Schuster, and Nicholas V. Hud. "Supramolecular assembly-enabled homochiral polymerization of short (dA)n oligonucleotides." Chemical Communications 57, no. 99 (2021): 13602–5. http://dx.doi.org/10.1039/d1cc05420a.

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A goal of supramolecular chemistry is to create covalent polymers of precise composition and stereochemistry from complex mixtures by the reversible assembly of specific monomers prior to covalent bond formation.
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24

Sarkar, Shuranjan, Dohyun Moon, Seog K. Kim, Myoung Soo Lah, and Hong‐In Lee. "Spontaneous Resolution Induced by a Chiral Ni(II) Complex with an Achiral Tripodal Ligand#." Bulletin of the Korean Chemical Society 36, no. 3 (2015): 838–42. http://dx.doi.org/10.1002/bkcs.10157.

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A chiral nickel(II) complex, [Ni(II)H3L](ClO4)2 (1), with an achiral ligand H3L (=tris{2‐(4‐imidazolyl)methyliminoethyl}amine) was synthesized by in situ reaction between nickel(II) perchlorate hexahydrate and a condensation mixture of 4‐imidazolecarboxaldehyde and tris(2‐aminoethyl)amine. Single crystal X‐ray analysis revealed that the H3L ligand hexadentately binds to Ni(II) ion through three Schiff‐base imine N atoms and three imidazole N atoms with distorted octahedral geometry. Both single‐crystal X‐ray diffraction and circular dichroism investigations found that the crystal of complex 1
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25

Meppelder, Geert-Jan M., Thomas P. Spaniol, and Jun Okuda. "A binaphtolate titanium complex featuring a linear tetradentate [OSSO]-bis(phenolato) ligand: Synthesis and partial hydrolysis to a homochiral dinuclear complex." Journal of Organometallic Chemistry 691, no. 14 (2006): 3206–11. http://dx.doi.org/10.1016/j.jorganchem.2006.02.006.

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26

Liu, Cai-Ming, De-Qing Zhang, Ren-Gen Xiong, Xiang Hao, and Dao-Ben Zhu. "A homochiral Zn–Dy heterometallic left-handed helical chain complex without chiral ligands: anion-induced assembly and multifunctional integration." Chemical Communications 54, no. 95 (2018): 13379–82. http://dx.doi.org/10.1039/c8cc07468b.

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27

Bagi, Péter, Réka Herbay, Gábor Györke, et al. "Preparation of Palladium(II) Complexes of 1-substituted-3-phospholene Ligands and their Evaluation as Catalysts in Hydroalkoxycarbonylation." Current Organic Chemistry 23, no. 25 (2020): 2873–79. http://dx.doi.org/10.2174/1385272823666191204151311.

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: A series of palladium(II) complexes incorporating 1-substituted-3-methyl-3- phospholenes as the P-ligands were prepared from phospholene oxides by deoxygenation followed by complexation with PdCl2(PhCN)2. The two 1-substituted-3-methyl-3- phospholene ligands were trans position to each other in the Pd(II)-complexes. As the ligands contain a P-stereogenic center, the Pd-complexes were obtained as a 1:1 mixture of two stereoisomers, the homochiral (R,R and S,S) and the meso (R,S) forms, when racemic starting materials were used. An optically active Pd-complex containing (R)-1-propyl- 3-phospho
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28

Brewer, Greg, Raymond J. Butcher, and Peter Zavalij. "Use of Pyrazole Hydrogen Bonding in Tripodal Complexes to Form Self Assembled Homochiral Dimers." Materials 13, no. 7 (2020): 1595. http://dx.doi.org/10.3390/ma13071595.

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The 3:1 condensation of 5-methyl-1H-pyrazole-3-carboxaldehyde (MepyrzH) with tris(2-aminoethyl)amine (tren) gives the tripodal ligand tren(MePyrzH)3. Aerial oxidation of a solution of cobalt(II) with this ligand in the presence of base results in the isolation of the insoluble Co(tren)(MePyrz)3. This complex reacts with acids, HCl/NaClO4, NH4ClO4, NH4BF4, and NH4I to give the crystalline compounds Co(tren)(MePyrzH)3(ClO4)3, {[Co(tren)(MePyrzH0.5)3](ClO4)1.5}2 {[Co(tren)(MePyrzH0.5)3](BF4)1.5}2 and [Co(tren)(MePyrzH)3][Co(tren)(MePyrzH)3]I2. The latter three complexes are dimeric, held together
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29

Seo, Chris S. G., Brian T. H. Tsui, Matthew V. Gradiski, Samantha A. M. Smith, and Robert H. Morris. "Enantioselective direct, base-free hydrogenation of ketones by a manganese amido complex of a homochiral, unsymmetrical P–N–P′ ligand." Catalysis Science & Technology 11, no. 9 (2021): 3153–63. http://dx.doi.org/10.1039/d1cy00446h.

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30

Ji, Can, Shuang-Quan Zang, Jun-Yi Liu, Jia-Bin Li, and Hong-Wei Hou. "Assembly of 1,2,3,4-Benzenetetracarboxylic Acid and Zinc(II) Metal Centers to a Chiral 3D Metal-organic Framework: Syntheses, Structure and Properties." Zeitschrift für Naturforschung B 66, no. 5 (2011): 533–37. http://dx.doi.org/10.1515/znb-2011-0514.

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A new three-dimensional metal-organic framework {[Zn(mpda)0.5(bix)]·(H2O)1.5}n (1) (H4mpda = 1,2,3,4-benzenetetracarboxylic acid, m-bix = 1,3-bis(imidazol-1-ylmethyl)-benzene) has been synthesized and characterized by single-crystal X-ray diffraction and IR spectra. In 1, homochiral helical chains are formed in the Zn-mpda layer through spontaneous resolution by mpda4−. Such layers are further connected through the second m-bix ligand to form a 3D chiral metal-organic framework. The individual (4,4)-connected net in 1 can be specified by the Schläfli symbol (66)2(64.82). Bulk material of 1 has
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31

Kureshy, Rukhsana I., Surendra Singh, Noor-Ul H. Khan, et al. "Improved catalytic activity of homochiral dimeric cobalt-salen complex in hydrolytic kinetic resolution of terminal racemic epoxides." Chirality 17, no. 9 (2005): 590–94. http://dx.doi.org/10.1002/chir.20196.

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32

Matveevskaya, Vladislava, Dmitry Pavlov, and Andrei Potapov. "Iridium(III) and Rhodium(III) Half-Sandwich Coordination Compounds with 11H-Indeno[1,2-b]quinoxalin-11-one Oxime: A Case of Spontaneous Resolution of Rh(III) Complex." Inorganics 10, no. 11 (2022): 179. http://dx.doi.org/10.3390/inorganics10110179.

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Two half-sandwich iridium(III) and rhodium(III) complexes with 11H-indeno[1,2-b]quinoxalin-11-one oxime (IQ-1) ligand were prepared by the reaction of the proligand with [M(Cp*)Cl2]2 (M = Ir, Rh) dimers. The reaction between IQ-1 and [Ir(Cp*)Cl2]2 in methanol gave the complex [Ir(Cp*)(IQ-1)Cl] (1), which crystallized in a centrosymmetric space group as a true racemate. Whereas complex [Rh(Cp*)(IQ-1)Cl] (2) in the form of a racemic conglomerate was obtained by the reaction of [Rh(Cp*)Cl2]2 and IQ-1 in methanol. The crystal structures of complexes 1 and 2 (R and S enantiomers) were determined by
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33

Ramiro, José Luis, Sonia Martínez-Caballero, Ana G. Neo, Jesús Díaz, and Carlos F. Marcos. "The Castagnoli–Cushman Reaction." Molecules 28, no. 6 (2023): 2654. http://dx.doi.org/10.3390/molecules28062654.

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Since the first reports of the reaction of imines and cyclic anhydrides by Castagnoli and Cushman, this procedure has been applied to the synthesis of a variety of lactams, some of them with important synthetic or biological interest. The scope of the reaction has been extended to the use of various Schiff bases and anhydrides as well as to different types of precursors for these reagents. In recent years, important advances have been made in understanding the mechanism of the reaction, which has historically been quite controversial. This has helped to develop reaction conditions that lead to
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34

Verdugo-Torres, Brayan David, Jairo Antonio Cubillos-Lobo, and Hugo Alfonso Rojas-Sarmiento. "Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst." Revista Facultad de Ingeniería Universidad de Antioquia, no. 89 (2018): 73–80. http://dx.doi.org/10.17533/udea.redin.n89a10.

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35

Kureshy, Rukhsana Ilyas, Noor-ul Hasan Khan, Sayed Hasan Razi Abdi, Irshad Ahmed, Surendra Singh, and Raksh Vir Jasra. "Enantioselective epoxidation of non-functionalised alkenes catalysed by dimeric homochiral Mn(III) Salen complex using oxone as oxidant." Journal of Molecular Catalysis A: Chemical 203, no. 1-2 (2003): 69–73. http://dx.doi.org/10.1016/s1381-1169(03)00258-9.

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36

García-Deibe, Ana M., Matilde Fondo, Julio Corredoira-Vázquez, M. Salah El Fallah, and Jesús Sanmartín-Matalobos. "Hierarchical Assembly of Antiparallel Homochiral Sheets Formed by Hydrogen-Bonded Helixes of a Trapped-Valence CoII/CoIII Complex." Crystal Growth & Design 17, no. 2 (2017): 467–73. http://dx.doi.org/10.1021/acs.cgd.6b01269.

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37

Řezanka, Tomáš, Andrea Palyzová, Milada Vítová, Tomáš Brányik, Markéta Kulišová, and Jarošová Kolouchová Irena. "Structural Characterization of Mono- and Dimethylphosphatidylethanolamines from Various Organisms Using a Complex Analytical Strategy including Chiral Chromatography." Symmetry 14, no. 3 (2022): 616. http://dx.doi.org/10.3390/sym14030616.

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Two minor phospholipids, i.e., mono- and/or dimethylphosphatidylethanolamines, are widespread in many organisms, from bacteria to higher plants and animals. A molecular mixture of methyl-PE and dimethyl-PE was obtained from total lipids by liquid chromatography and further identified by mass spectrometry. Total methyl-PE and dimethyl-PE were cleaved by phospholipase C, and the resulting diacylglycerols, in the form of acetyl derivatives, were separated into alkyl-acyl, alkenyl-acyl, and diacylglycerols. Reversed-phase LC/MS allowed dozens of molecular species to be identified and further analy
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38

Sellmann, Dieter, Frank W. Heinemann та Torsten Gottschalk-Gaudig. "Structure of [μ-S2{Ru(PCy3)('S4')}2] · 2.5 THF ·0.5 Et2O Containing Homochiral Metal Complex Fragments ['S4'2- = 1,2-Bis(mercaptophenylthio)-ethane (2-)]". Zeitschrift für Naturforschung B 54, № 9 (1999): 1122–24. http://dx.doi.org/10.1515/znb-1999-0905.

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A crystal of the title compound [μ-S2{Ru(PCy3)(′S4′)}2] · 2.5 THF · 0.5 Et2O (1 · 2.5 THF · 0.5 Et2O), grown from a THF/Et2O solution, was investigated by single-crystal X-ray analysis. 1 · 2.5 THF · 0.5 Et2O crystallizes in the triclinic space group P1̄ with a = 14.209(4), b = 15.390(4), c = 19.526(6) Å, α = 111.29(2), ß = 100.43(2), γ = 95.65(2)°, and Z = 2. The crystal structure was solved by direct methods (wR2= 0.1520 for 12565 reflections; R1 = 0.0507 for 9205 observed reflections). The molecular structure of 1 · 2.5 THF · 0.5 Et2O is characterized by a trans η1 -η1-S2 bridge connecting
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39

Wang, Qiang, Shari Venneri, Niloofar Zarrabi, et al. "Stereochemistry for engineering spin crossover: structures and magnetic properties of a homochiral vs. racemic [Fe(N3O2)(CN)2] complex." Dalton Transactions 44, no. 15 (2015): 6711–14. http://dx.doi.org/10.1039/c5dt00357a.

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40

Boiocchi, Massimo, and Luigi Fabbrizzi. "Double-stranded dimetallic helicates: assembling–disassembling driven by the CuI/CuII redox change and the principle of homochiral recognition." Chem. Soc. Rev. 43, no. 6 (2014): 1835–47. http://dx.doi.org/10.1039/c3cs60428d.

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Upon reduction of a mononuclear complex of Cu<sup>II</sup> with a tetradentate ligand (a racemic mixture of the S,S and R,R enantiomers) two dicopper(i) double stranded helicates form, each one containing strands of the same chirality.
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41

Ajayi, Tomilola J., Amanda L. Kwan, Alan J. Lough, and Robert H. Morris. "A homochiral Nickel(II) complex [Ni(P'N)2]Cl2: Synthesis, characterization, crystal structure, luminescence, DFT and Hirshfeld surface studies." Journal of Molecular Structure 1322 (February 2025): 140292. http://dx.doi.org/10.1016/j.molstruc.2024.140292.

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42

Kazemi, Zahra, Hadi Amiri Rudbari, Mehdi Sahihi, et al. "New homochiral and heterochiral Mo(VI) complex from racemic ligand: Synthesis, X-ray structure, diastereomers separation and biological activities." Polyhedron 170 (September 2019): 70–85. http://dx.doi.org/10.1016/j.poly.2019.05.021.

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43

Sellmann, Dieter, Helge Friedrich, and Falk Knoch. "Übergangsmetallkomplexe mit Schwefelliganden, XCIX. Bildung und Struktur von [Fe(′S4′)]4. Eine bemerkenswerte Tetramerisierung homochiraler[Fe(′S4′)]-Komplexfragmente (′S4′2- = 1,2-Bis(2-mercaptophenylthio)ethan(2-)) / Transition Metal Complexes with Sulfur Ligands, XCIX. Formation and Structure of [Fe(′S4′)]4. A Remarkable Tetramerization of Homochiral [Fe(′S4′)] Complex Fragments (′S4′2-= 1,2-Bis(2-mercaptophenylthio)ethane(2–))." Zeitschrift für Naturforschung B 48, no. 11 (1993): 1675–80. http://dx.doi.org/10.1515/znb-1993-1128.

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In MeOH/THF solution, Fe(II) ions and the tetradentate thioether-thiolate ′S4′2-([1,2-Bis(2-mercaptophenylthio)ethane(2-)]) slowly form the tetrameric [Fe(′S4′)]4 1. The crystal structure of 1 · THF • 2 MeOH was determined by X-ray structure analysis. Chiral 1 crystallizes as a pair of enantiomers each of which consist of four homochiral [Fe(′S4′)] fragments bridged via μ2- and µ3-S(thiolato) donors; stereochemical aspects of the enantiospecific tetramerization of [Fe(′S4′)] fragments are discussed. In strong polar solvents such as dimethylformamide, dissociation of [Fe(′S4′)]4 into [Fe(′S4′)]
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44

Fox, Allison C., Jason D. Boettger, Eve L. Berger, and Aaron S. Burton. "The Role of the CuCl Active Complex in the Stereoselectivity of the Salt-Induced Peptide Formation Reaction: Insights from Density Functional Theory Calculations." Life 13, no. 9 (2023): 1796. http://dx.doi.org/10.3390/life13091796.

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The salt-induced peptide formation (SIPF) reaction is a prebiotically plausible mechanism for the spontaneous polymerization of amino acids into peptides on early Earth. Experimental investigations of the SIPF reaction have found that in certain conditions, the l enantiomer is more reactive than the d enantiomer, indicating its potential role in the rise of biohomochirality. Previous work hypothesized that the distortion of the CuCl active complex toward a tetrahedral-like structure increases the central chirality on the Cu ion, which amplifies the inherent parity-violating energy differences
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45

Wölper, Christoph, Sara Durán Ibáńez, and Peter G. Jones. "Amine-rich Silver Complexes of rac-trans-1,2-Diaminocyclohexane." Zeitschrift für Naturforschung B 65, no. 10 (2010): 1249–57. http://dx.doi.org/10.1515/znb-2010-1012.

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The use of the diamine rac-trans-1,2-diaminocyclohexane (LL) as a major component of the solvent system allows the isolation of crystalline silver complexes with higher ratios of LL to silver (up to 4 : 1, compared to the previously obtained 1 : 1 in ethanolic solution). The complexes obtained and crystallographically characterized were (LL)2AgNO3 (1), (LL)3Ag(OAc)(H2O)2 (2) and (LL)4AgBr(H2O)3 (3). Additionally, the silver-free compounds (LL)・(H2O) (4) and (LL)3・HCl (5) were obtained as by-products. Complex 1 is a chain polymer with one bridging and one terminal LL ligand; the chains are homo
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46

Rajat, Saha, Roychowdhury Anirban, M. Steele I., Biswas Susobhan, and Kumar Sanjay. "{[Mn2(L-tartrate)2(H2O)].3H2O}n- A chiral MOF Adsorption and guest dependent magnetism." Journal of Indian Chemical Society Vol. 90, Aug 2013 (2013): 1043–52. https://doi.org/10.5281/zenodo.5782859.

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Department of Physics, Jadavpur University, Jadavpur, Kolkata-700 032, India <em>E-mail </em>: kumars@phys.jdvu.ac.in, susobhanl_b@yahoo.co.in Fax: 91-33-24138917 UGC-DAE Consortium for Scientific..: Research, III/LB-8, Kolkata-700 098, India Department of Geophysical Sciences, The University of Chicago, USA <em>Manuscript received online 06 August 2012, revised 11 September 2012, accepted 13 September 2012</em> A 3D nano-porous chiralmetal-organic framework (CMOF), namely, {[Mn<sub>2</sub>(tartrate)<sub>2</sub>(H<sub>2</sub>O)].3H<sub>2</sub>O}<sub>n&nbsp;</sub>has been synthesized at room te
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47

Morvan, Marine, and Ivan Mikšík. "Recent Advances in Chiral Analysis of Proteins and Peptides." Separations 8, no. 8 (2021): 112. http://dx.doi.org/10.3390/separations8080112.

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Like many biological compounds, proteins are found primarily in their homochiral form. However, homochirality is not guaranteed throughout life. Determining their chiral proteinogenic sequence is a complex analytical challenge. This is because certain d-amino acids contained in proteins play a role in human health and disease. This is the case, for example, with d-Asp in elastin, β-amyloid and α-crystallin which, respectively, have an action on arteriosclerosis, Alzheimer’s disease and cataracts. Sequence-dependent and sequence-independent are the two strategies for detecting the presence and
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48

Cambie, RC, KC Higgs, JJ Rustenhoven, and PS Rutledge. "Experiments Directed Towards the Synthesis of Anthracyclinones. XXIX. Fluoro-Substituted Tetracycles." Australian Journal of Chemistry 49, no. 7 (1996): 751. http://dx.doi.org/10.1071/ch9960751.

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Diastereoselective formation of 9-fluoro-9-methylanthracyclinones has been achieved by treating ortho-methallyl-substituted anthraquinonyl homochiral dioxans with boron trifluoride etherate . The demethoxy anthraquinonyl dioxan (16) underwent slow reaction to give exclusively the (7S,9R) fluoro tetracycle (21) in 58% yield. The dimethoxy anthraquinonyl dioxan (15) was less reactive, allowing other reactions to compete, but boron trifluoride -acetic acid complex effected rapid cyclization of (15) with high diastereoselectivity. Short reaction times with this reagent circumvented the formation o
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49

Shi, Wei, Jian-Jun Liu, Xiang-Ping Ou, and Chang-Cang Huang. "A three-dimensional cadmium(II) coordination polymer with unequal homochiral double-stranded concentric helical chains." Acta Crystallographica Section C Structural Chemistry 71, no. 4 (2015): 289–93. http://dx.doi.org/10.1107/s2053229615004258.

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A homochiral helical three-dimensional coordination polymer, poly[[(μ2-acetato-κ3O,O′:O)(hydroxido-κO)(μ4-5-nicotinamido-1H-1,2,3,4-tetrazol-1-ido-κ5N1,O:N2:N4:N5)(μ3-5-nicotinamido-1H-1,2,3,4-tetrazol-1-ido-κ4N1,O:N2:N4:N5)dicadmium(II)] 0.75-hydrate], {[Cd2(C7H5N6O)2(CH3COO)(OH)]·0.75H2O}n, was synthesized by the reaction of cadmium acetate,N-(1H-tetrazol-5-yl)isonicotinamide (H-NTIA), ethanol and H2O under hydrothermal conditions. The asymmetric unit contains two crystallographically independent CdIIcations, two deprotonated 5-nicotinamido-1H-1,2,3,4-tetrazol-1-ide (NTIA−) ligands, one acet
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50

Djukic, Jean-Pierre, Jean-Baptiste Sortais, Laurent Barloy, Nicolas Pannetier, Claude Sirlin, and Michel Pfeffer. "Synthesis, Characterization, and Fluxional Behavior of a 34 Electron Homochiral Dimetallic Complex with an Unsupported Hydride Bridge between Two Ru Atoms." Organometallics 31, no. 7 (2012): 2821–28. http://dx.doi.org/10.1021/om201093y.

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