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Journal articles on the topic '2-dihydroquinoline polymer (C12H15N)n'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Yu, Liu, Gao Qingyu, Liu Lianxin, and Li Shuting. "Investigation into the analysis method of the Rubber Anti-oxidant RD by HPLC gradient elution." Journal of Indian Chemical Society Vol. 91, Mar 2014 (2014): 449–53. https://doi.org/10.5281/zenodo.5717618.

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College of Chemistry and Engineering Technology, China University of Mining and Technology, Xuzhou 221116, China <em>E-mail</em> : liuyu0138@163.com Xuzhou College of Industrial Technology, Jiangsu Xuzhou 221140, China Manuscript received online 09 June 2012, revised 08 January 2013, accepted 20 July 2013 RD (2,2,4-trimethyl-1,2-dihydroquinoline polymer (C<sub>12</sub>H<sub>15</sub>N)<sub>n</sub> , n = 2~4, TMDQP) the higher the polymer content, the better the quality, but in the national standards, lack of assay methods, and lack of communication between the business and technology of mutual

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2

Niu, Xiang-Long, Lin Wei, Jian-Cheng Liu, et al. "Syntheses and structures of three macrocyclic supramolecular complexes and one ZnII-containing coordination polymer generated from a semi-rigid multidentate N-containing ligand." Acta Crystallographica Section C Structural Chemistry 77, no. 1 (2021): 29–39. http://dx.doi.org/10.1107/s2053229620016083.

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Semirigid organic ligands can adopt different conformations to construct coordination polymers with more diverse structures when compared to those constructed from rigid ligands. A new asymmetric semirigid organic ligand, 4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine (L), has been prepared and used to synthesize three bimetallic macrocyclic complexes and one coordination polymer, namely, bis(μ-4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine)bis[dichloridozinc(II)] dichloromethane disolvate, [Zn2Cl4(C12H10N6)2]·2CH2Cl2, (I), the analogous chloroform monosolvate, [Zn2Cl4(C12H10N6)2

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3

Yang, Huai-Xia, Yan-Qiu Yang, Di Cheng, Ya-Xue Li, and Xiang-Ru Meng. "A new two-dimensional CdIIcoordination polymer based on 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole and benzene-1,2-dicarboxylate: synthesis, crystal structure and characterization." Acta Crystallographica Section C Structural Chemistry 73, no. 10 (2017): 828–32. http://dx.doi.org/10.1107/s2053229617013080.

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In the construction of coordination polymers, many factors can influence the formation of the final architectures, such as the nature of the metal centres, the organic ligands and the counter-anions. In the coordination polymer poly[aqua(μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′)[μ-2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole-κ2N2:N3]cadmium(II)], [Cd(C12H12N4)(C8H4O4)(H2O)]nor [Cd(immb)(1,2-bdic)(H2O)]n, each CdIIion is seven-coordinated by two N atoms from two symmetry-related 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole (immb) ligands, by four O atoms from two symmetry-rel

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Atria, Ana María, Maria Teresa Garland, and Ricardo Baggio. "Two nickel(II) bis[(pyridin-2-yl)methyl]amine complexes with homophthalic and benzene-1,2,4,5-tetracarboxylic acids." Acta Crystallographica Section C Structural Chemistry 70, no. 6 (2014): 541–46. http://dx.doi.org/10.1107/s2053229614008134.

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Two new NiIIcomplexes involving the ancillary ligand bis[(pyridin-2-yl)methyl]amine (bpma) and two different carboxylate ligands,i.e.homophthalate [hph; systematic name: 2-(2-carboxylatophenyl)acetate] and benzene-1,2,4,5-tetracarboxylate (btc), namelycatena-poly[[aqua{bis[(pyridin-2-yl)methyl]amine-κ3N,N′,N′′}nickel(II)]-μ-2-(2-carboxylatophenyl)aceteto-κ2O:O′], [Ni(C9H6O4)(C12H13N3)(H2O)]n, and (μ-benzene-1,2,4,5-tetracarboxylato-κ4O1,O2:O4,O5)bis(aqua{bis[(pyridin-2-yl)methyl]amine-κ3N,N′,N′′}nickel(II)) bis(triaqua{bis[(pyridin-2-yl)methyl]amine-κ3N,N′,N′′}nickel(II)) benzene-1,2,4,5-tetra

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Setifi, Zouaoui, Fatima Setifi, Mohamed Saadi, Djamil-Azzeddine Rouag та Christopher Glidewell. "catena-Poly[[[4-amino-3,5-bis(pyridin-2-yl)-4H-1,2,4-triazole-κ2N1,N5](dicyanamido-κN)copper(II)]-μ2-dicyanamido-κ2N:N′]: coordination polymer chains linked into a bilayer by hydrogen bonds and π–π stacking interactions". Acta Crystallographica Section C Structural Chemistry 70, № 4 (2014): 359–63. http://dx.doi.org/10.1107/s205322961400504x.

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In the title compound, [Cu(C2N3)2(C12H10N6)]nor [Cu(dca)2(abpt)]n, where abpt is 4-amino-3,5-bis(pyridin-2-yl)-4H-1,2,4-triazole and dca is the dicyanamide anion, the CuIIcentre is five-coordinate with an approximately square-pyramidal geometry. One of the two dicyanamide ligands is a terminal ligand, but the other one acts as a μ1,5-bridging ligand between pairs of CuIIcentres, so generating a one-dimensional coordination polymer. A combination of N—H...N and C—H...N hydrogen bonds, augmented by π–π stacking interactions, links the coordination polymer chains into a bilayer structure. Compari

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Huang, Qiu-Ying, Yang Zhao, and Xiang-Ru Meng. "Syntheses, structures and characterization of isomorphous CoII and NiII coordination polymers based on 2-[(1H-imidazol-1-yl)methyl]-6-methyl-1H-benzimidazole and benzene-1,4-dicarboxylate." Acta Crystallographica Section C Structural Chemistry 73, no. 8 (2017): 645–51. http://dx.doi.org/10.1107/s2053229617010877.

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Careful choice of the organic ligands is one of the most important parameters in the rational design and synthesis of coordination polymers. Aromatic polycarboxylates have been widely used in the preparation of metal–organic polymers since they can utilize various coordination modes to form diverse structures and can act as hydrogen-bond acceptors and donors in the assembly of supramolecular structures. Nitrogen-heterocyclic organic compounds have also been used extensively as ligands for the construction of polymers with interesting structures. In the polymers catena-poly[[[diaquabis{2-[(1H-i

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Wang, Junfeng, Qimeng Liu, and Dong Liu. "Topological structural diversification of zinc coordination polymers caused by the spacers of different dicarboxylates." Acta Crystallographica Section C Structural Chemistry 81, no. 6 (2025): 351–57. https://doi.org/10.1107/s2053229625004528.

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As a new generation of multi-functional materials, crystalline coordination polymers have attracted widespread attention due to their fascinating framework structures, interesting topologies and potential applications. Two new coordination polymers, namely, poly[[μ2-trans-1,2-bis(pyridin-3-yl)ethylene-κ2 N:N′]bis(μ3-terephthalato-κ3 O:O′:O′′)dizinc(II)], [Zn2(C8H4O4)2(C12H10N2)] n or [Zn2(tp)2(3,3′-dpe)] n , (I), and poly[diaqua[μ2-trans-1,2-bis(pyridin-3-yl)-ethylene-κ2 N:N′]bis(μ2-furan-2,5-dicarboxylate-κ2 O:O′)dizinc(II)], [Zn2(C6H2O5)2(C12H10N2)(H2O)2] n or [Zn2(fdc)2(3,3′-dpe)(H2O)2] n ,

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8

Shen, Hong. "A three-dimensional CdIIcoordination framework: poly[di-μ2-aqua-{μ2-1,4-bis[(1H-1,2,4-triazol-1-yl)methyl]benzene-κ2N4:N4′}di-μ3-terephthalato-κ3O:O′:O′′-dicadmium(II)]". Acta Crystallographica Section C Structural Chemistry 70, № 11 (2014): 1025–28. http://dx.doi.org/10.1107/s2053229614020610.

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The title CdIIcoordination polymer, [Cd(C10H8O4)(C12H12N6)0.5(H2O)]n, has been obtained by the hydrothermal method and studied by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy and fluorescence spectroscopy. The compound forms a novel three-dimensional framework with 3,8-connected three-dimensional binodal {4.52}2{42.510.612.7.83} topology. An investigation of its photoluminescence properties shows that the compound exhibits a strong fluorescence emission in the solid state at room temperature.

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Zhang, Ya-Qian, Vladislav A. Blatov, Xiu-Xiu Lv, et al. "Construction of (3,8)-connected three-dimensional cobalt(II) and copper(II) coordination polymers with 1,3-bis[(1,2,4-triazol-4-yl)methyl]benzene and benzene-1,3,5-tricarboxylate ligands." Acta Crystallographica Section C Structural Chemistry 75, no. 7 (2019): 960–68. http://dx.doi.org/10.1107/s205322961900826x.

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Coordination polymers (CPs) have been widely studied because of their diverse and adjustable topologies and wide-ranging applications in luminescence, chemical sensors, magnetism, photocatalysis, gas adsorption and separation. In the present work, two coordination polymers, namely poly[(μ5-benzene-1,3,5-tricarboxylato-κ6 O 1:O 1′:O 3:O 3:O 5,O 5′){μ3-1,3-bis[(1,2,4-triazol-4-yl)methyl]benzene-κ3 N:N′:N′′}di-μ3-hydroxido-dicobalt(II)], [Co2(C9H3O6)(OH)(C12H12N6)] n or [Co2(btc)(OH)(mtrb)] n , (1), and poly[[diaquabis(μ3-benzene-1,3,5-tricarboxylato-κ3 O 1:O 3:O 5)bis{μ3-1,3-bis[(1,2,4-triazol-4

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Wang, Lin, Qian-Kun Zhou, Yun Xu, and Ni-Ya Li. "Substituent effects of two isophthalate derivatives on the construction of cadmium coordination polymers incorporating a dipyridyl ligand." Acta Crystallographica Section C Structural Chemistry 74, no. 8 (2018): 894–900. http://dx.doi.org/10.1107/s2053229618009312.

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In recent years, the design and construction of crystalline coordination complexes by the assembly of metal ions with multitopic ligands have attracted considerable attention because of the unique architectures and potential applications of these compounds. Two new coordination polymers, namely poly[[μ-trans-1-(2-aminopyridin-3-yl)-2-(pyridin-4-yl)ethene-κ2 N:N′](μ3-5-methylisophthalato-κ4 O 1,O 1′:O 3:O 3′)cadmium(II)], [Cd(C9H6O4)(C12H11N3)] n or [Cd(5-Me-ip)(2-NH2-3,4-bpe)] n , (I), and poly[[μ-trans-1-(2-aminopyridin-3-yl)-2-(pyridin-4-yl)ethene-κ2 N:N′](μ2-5-hydroxyisophthalato-κ4 O 1,O 1

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11

Liu, Ya-Hui, Li-Ping Lu, Miao-Li Zhu, and Feng Su. "A three-dimensional mixed-valence CuII/CuIcoordination polymer constructed from biphenyl-3,4′,5-tricarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands." Acta Crystallographica Section C Structural Chemistry 72, no. 4 (2016): 358–62. http://dx.doi.org/10.1107/s2053229616004824.

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Coordination polymers (CPs) built by coordination bonds between metal ions/clusters and multidentate organic ligands exhibit fascinating structural topologies and potential applications as functional solid materials. The title coordination polymer, poly[diaquabis(μ4-biphenyl-3,4′,5-tricarboxylato-κ4O3:O3′:O4′:O5)tris[μ2-1,4-bis(1H-imidazol-1-yl)benzene-κ2N3:N3′]dicopper(II)dicopper(I)], [CuII2CuI2(C15H7O6)2(C12H10N4)3(H2O)2]n, was crystallized from a mixture of biphenyl-3,4′,5-tricarboxylic acid (H3bpt), 1,4-bis(1H-imidazol-1-yl)benzene (1,4-bib) and copper(II) chloride in a water–CH3CN mixtur

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Li, Ni-Ya, and Dong Liu. "Synthesis, structure and photoluminescence properties of a three-dimensional cadmium(II) (4,5)-connected coordination network." Acta Crystallographica Section C Structural Chemistry 74, no. 12 (2018): 1581–85. http://dx.doi.org/10.1107/s2053229618015073.

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The assembly of coordination polymers from metal ions and organic moieties is currently attracting considerable attention in crystal engineering due to their intriguing architectures and potential applications as functional materials. A new coordination polymer, namely poly[[μ2-trans-1,2-bis(pyridin-3-yl)ethylene-κ2 N:N′]bis(μ4-4,4′-oxydibenzoato-κ6 O:O,O′:O′′:O′′,O′′′)dicadmium(II)], [Cd2(C14H8O5)2(C12H10N2)] n or [Cd2(4,4′-OBB)2(3,3′-BPE)] n , has been synthesized by the the self-assembly of Cd(NO3)2·4H2O, 4,4′-oxydibenzoic acid (4,4′-H2OBB) and trans-1,2-bis(pyridin-3-yl)ethene (3,3′-BPE) u

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Ng, Seik Weng. "SQUEEZE for treating severely disordered solvent molecules in the refinement of the otherwise ordered crystal structures of [Cd(C12H10N4)(C15H9O2)2(CH3OH)]·0.5H2O·CH3OH and [Cd(C12H10N4)1.5(C15H9O2)2]·CH3OH." Macedonian Journal of Chemistry and Chemical Engineering 34, no. 1 (2015): 57. http://dx.doi.org/10.20450/mjcce.2015.628.

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In the refinement of the crystal structure of [Cd(C<sub>12</sub>H<sub>10</sub>N<sub>4</sub>)(C<sub>15</sub>H<sub>9</sub>O<sub>2</sub>)<sub>2</sub>(CH<sub>3</sub>OH)]<sup>.</sup>0.5H<sub>2</sub>O<sup>.</sup>CH<sub>3</sub>OH, the lattice water molecule was not located by difference Fourier synthesis but was instead deduced by using <em>SQUEEZE</em> owing to severe disorder of the water molecule in the otherwise ordered crystal structure. Simi

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Yu, Cai-Xia, Feng Zhao, Min Zhou, Dan-Feng Zhi та Lei-Lei Liu. "A three-dimensional ZnIIcoordination framework: poly[[μ2-(E)-1,2-bis(pyridin-4-yl)ethene][μ4-(E)-2,2′-(diazene-1,2-diyl)dibenzoato][μ2-(E)-2,2′-(diazene-1,2-diyl)dibenzoato]dizinc(II)]". Acta Crystallographica Section C Structural Chemistry 70, № 3 (2014): 277–80. http://dx.doi.org/10.1107/s2053229614001077.

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In the title coordination polymer, [Zn2(C14H8N2O4)2(C12H10N2)]n, the asymmetric unit contains one ZnIIcation, two halves of 2,2′-(diazene-1,2-diyl)dibenzoate anions (denotedL2−) and half of a 1,2-bis(pyridin-4-yl)ethene ligand (denoted bpe). The three ligands lie across crystallographic inversion centres. Each ZnIIcentre is four-coordinated by three O atoms of bridging carboxylate groups from threeL2−ligands and by one N atom from a bpe ligand, forming a tetrahedral coordination geometry. Two ZnIIatoms are bridged by two carboxylate groups ofL2−ligands, generating a [Zn2(CO2)2] ring. Each loop

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Zuo, Yuxiang, Jie Yang, Cheng Chen, Yun-Shan Xue, and Jun Zhang. "Assembly of two novel coordination polymers by selecting ditopic or chelating auxiliary ligands with naphthalene-2,6-dicarboxylic acid: synthesis, structure and luminescence sensing." Acta Crystallographica Section C Structural Chemistry 76, no. 12 (2020): 1076–84. http://dx.doi.org/10.1107/s2053229620015260.

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The FeIII ion as a ubiquitous metal plays a key role in biochemical processes. Iron deficiency or excess in the human body can induce various diseases. Thus, effective detection of the FeIII ion has been deemed an issue of focus. To develop more crystalline chemical sensors for the selective detection of Fe3+, two novel two-dimensional (2D) coordination polymers, namely, poly[[[μ-bis(pyridin-4-yl)amine-κ2 N:N′](μ-naphthalene-2,6-dicarboxylato-κ2 O 2:O 6)zinc(II)] 0.5-hydrate], {[Zn(C12H6O4)(C10H9N3)]·0.5H2O} n , 1, and poly[(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)(μ-naphthalene-2,6-dicarboxylat

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Su, Feng, and Li-Ping Lu. "A three-dimensional CdIIcoordination polymer constructed from 1,1′-biphenyl-2,2′,5,5′-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands." Acta Crystallographica Section C Structural Chemistry 71, no. 7 (2015): 534–38. http://dx.doi.org/10.1107/s2053229615010992.

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The title coordination polymer, poly[[aqua(μ5-1,1′-biphenyl-2,2′,5,5′-tetracarboxylato)bis[μ2-1,4-bis(1H-imidazol-1-yl)benzene]dicadmium(II)] dihydrate], {[Cd2(C16H6O8)(C12H10N4)2(H2O)]·2H2O}n, was crystallized from a mixture of 1,1′-biphenyl-2,2′,5,5′-tetracarboxylic acid (H4bpta), 1,4-bis(1H-imidazol-1-yl)benzene (1,4-bib) and cadmium nitrate in water–dimethylformamide. The crystal structure consists of two crystallographically independent CdIIcations, with one of the CdIIcations possessing a slightly distorted pentagonal bipyramidal geometry. The second CdIIcentre is coordinated by carboxyl

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Li, Shao-Dong, Feng Su, Miao-Li Zhu, and Li-Ping Lu. "A novel three-dimensional tetranuclear CoII coordination polymer with water hexamers based on the V-shaped tetracarboxylate ligand 4-(2,4-dicarboxylatophenoxy)phthalate." Acta Crystallographica Section C Structural Chemistry 76, no. 9 (2020): 863–68. http://dx.doi.org/10.1107/s2053229620010633.

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A new coordination polymer (CP), namely, poly[[diaquatris[μ2-1,4-bis(1H-imidazol-1-yl)benzene]bis[μ6-4-(2,4-dicarboxylatophenoxy)phthalato]tetracobalt(II)] hexahydrate], {[Co4(C16H6O9)2(C12H10N4)3(H2O)2]·6H2O} n , has been synthesized by solvothermal reaction. The CP was fully characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis, and powder and single-crystal X-ray diffraction. It presents a three-dimensional (3D) structure based on tetranuclear CoII secondary building units (SBUs) with a tfz-d net and point symbol (43)2(46·618·84). The 4-(2,4-dicarboxyphenoxy)phtha

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Chen, Jing-Min, Qian-Kun Zhou, Yi-Xuan Hou, and Dong Liu. "Construction and photocatalytic properties of two metal-mediated coordination polymers based on benzene-1,3,5-tricarboxylic acid and trans-1-(pyridin-3-yl)-2-(pyridin-4-yl)ethene." Acta Crystallographica Section C Structural Chemistry 73, no. 11 (2017): 1017–23. http://dx.doi.org/10.1107/s2053229617013444.

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With the rapid development of modern industry, water pollution has become an intractable environmental issue facing humans worldwide. In particular, the organic dyes discharged into natural water from dyestuffs, dyeing and the textile industry are the main sources of pollution in wastewater. To eliminate these types of pollutants, degradation of organic contaminants through a photocatalytic technique is an effective methodology. To exploit more crystalline photocatalysts for the degradation of organic dyes, two coordination polymers, namely catena-poly[[(3,5-dicarboxybenzene-1-carboxylato-κO 1

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Fwu Ming, Shen, та Lush Shie Fu. "Crystal structure of the coordination polymer catena-poly[[bis[hydroxy(phenyl)acetato-κ2 O 1,O 2]zinc(II)]-μ2-1,2-bis(pyridin-4-yl)ethane-κ2 N:N′]". Acta Crystallographica Section E Crystallographic Communications 76, № 12 (2020): 1868–70. http://dx.doi.org/10.1107/s2056989020014322.

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In the title polymeric ZnII compound, [Zn(C8H7O3)2(C12H12N2)] n , the Zn cation is coordinated by two N atoms from 1,2-bis(pyridin-4-yl)ethane unit and four O atoms from two mandelate [or hydroxy(phenyl)acetate] anions in a slightly distorted octahedral coordination geometry. The 1,2-bis(pyridin-4-yl)ethane unit bridges two ZnII cations, related by an inversion centre, to form a polymeric chain along [110]. The crystal structure features extensive O—H...O and weak C—H ...O hydrogen bonds, with C—H ... π interactions and π–π interactions also being present. The centroid–centroid distance betwee

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Chu, Xin, and Kou-Lin Zhang. "Preparation and characterization of two new CuII supramolecular coordination polymers incorporating sulfobenzoate and flexible heterocyclic ligands." Acta Crystallographica Section C Structural Chemistry 73, no. 12 (2017): 1087–97. http://dx.doi.org/10.1107/s2053229617014899.

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The assembly of CuII with the multifunctional ligand 2-amino-4-sulfobenzoic acid (H2asba) in the presence of the auxiliary flexible ligands 1,4-bis(triazol-1-ylmethyl)benzene (bbtz) and 1,4-bis(imidazol-1-ylmethyl)benzene (bix) under ambient conditions resulted in two new supramolecular coordination polymers, namely poly[[(3-amino-4-carboxybenzenesulfonato-κO)aquabis[μ2-1,4-bis(triazol-1-ylmethyl)benzene-κ2 N 4:N 4′]copper(II)] 3-amino-4-carboxybenzenesulfonate tetrahydrate], {[Cu(C7H6NO5S)(C12H12N6)2(H2O)](C7H6NO5S)·4H2O} n , (1), and poly[[bis(μ2-2-amino-4-sulfonatobenzoato-κ3 O 1:N,O 1′)tet

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Bai, Yuting, Meirong Han, Enxi Wu, Sisi Feng, and Miaoli Zhu. "Cadmium(II) three-dimensional coordination polymers constructed from 1,3,5-tris(4-carboxyphenoxy)benzene: synthesis, crystal structure, fluorescence and I2 sorption characterization." Acta Crystallographica Section C Structural Chemistry 75, no. 5 (2019): 575–83. http://dx.doi.org/10.1107/s2053229619004960.

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Two three-dimensional (3D) CdII coordination polymers, namely poly[[di-μ-aqua-diaquabis{μ5-4,4′,4′′-[benzene-1,3,5-triyltris(oxy)]tribenzoato}tricadmium(II)] dihydrate], {[Cd3(C27H15O9)2(H2O)4]·2H2O} n , (I), and poly[[aqua{μ6-4,4′,4′′-[benzene-1,3,5-triyltris(oxy)]tribenzoato}(μ-formato)[μ-1,1′-(1,4-phenylene)bis(1H-imidazole)]dicadmium(II)] dihydrate], {[Cd2(C27H15O9)(C12H10N4)(HCOO)(H2O)]·2H2O} n , (II), have been hydrothermally synthesized from the reaction system containing Cd(NO3)2·4H2O and the flexible tripodal ligand 1,3,5-tris(4-carboxyphenoxy)benzene (H3tcpb) via tuning of the auxili

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S. Abdel Zaher, Khlood, R. H. Swellem, Galal A.M. Nawwar, Fathy M. Abdelrazek, and Salwa H. El-Sabbagh. "Proper use of rice straw black liquor: lignin/silica derivatives as efficient green antioxidants for SBR rubber." Pigment & Resin Technology 43, no. 3 (2014): 159–74. http://dx.doi.org/10.1108/prt-01-2013-0001.

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Purpose – The purpose of this paper is to study the efficiency of lignin/silica and calcium lignate/calcium silicate as natural antioxidants in styrene-butadiene rubber (SBR) vulcanizates. Design/methodology/approach – It has been found that thermal aging data of the aged sample revealed that SBR vulcanizate undergoes crosslink reactions that lead to embrittlement and ultimately failure. Incorporation of lignin/silica or calcium lignate/calcium silicate, however, resulted in significant improvement of the degradation profile of the vulcanizates at 90±1°C. Loss of tensile strength and flexibili

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Neal, Henry C., Harsha Tamtam, Bradley W. Smucker та Volodymyr V. Nesterov. "Redetermination of poly[di-μ3-iodido-[μ-1,2-trans-(pyridin-4-yl)ethene-κ2 N:N′]dicopper(I)]". IUCrData 4, № 1 (2019). http://dx.doi.org/10.1107/s2414314619001226.

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The re-investigated structure of the title compound, [Cu2I2(C12H10N2)] n , a two-dimensional coordination polymer crystallizing with monoclinic (P21/n) symmetry, is based on data collected at 100 K, while the previously reported structure was obtained with data collected at 203 K [Blake et al. (1999). Cryst. Eng. 2, 181–195]. The refinement of the crystal structure is greatly improved; for example, the wR 2 residual converges to 0.047 for 1532 independent data, versus wR 2 = 0.179 for 992 independent data in the 1999 study.

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Hoffman, Jessica L., Jessie E. Akhigbe, Eric W. Reinheimer та Bradley W. Smucker. "Poly[[[μ-trans-1,2-bis(pyridin-4-yl)ethene-κ2 N:N′]-μ-iodido-copper(I)]–trans-1,2-bis(pyridin-4-yl)ethene (1/0.25)]". IUCrData 5, № 7 (2020). http://dx.doi.org/10.1107/s2414314620009980.

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Abstract:

The title compound, {[CuI(bpe)]·0.25(bpe)} n , was synthesized similarly to (CuI)2(bpe) [Neal et al. (2019). IUCrData, 4, x190122] with red crystals grown from acetonitrile solutions of CuI and the bpe ligand [bpe = 1,2-bis(pyridin-4-yl)ethene, C12H10N2]. The structure of the title compound is a type 1 complex in the Graham nomenclature [Graham et al. (2000). Inorg. Chem. 39, 5121–5132], having rhombic dimers of Cu2I2 that are bridged by two bpe ligands, to form oligomeric ribbons arranged as stairsteps. The step height is 2.8072 (11) Å, which is the Cu—Ii distance of the dimer [symmetry code

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Setifi, Zouaoui, Sylvain Bernès, David K. Geiger, Fatima Setifi та Jan Reedijk. "Concomitant dimorphism in poly[di-μ-azido-(5,5′-dimethyl-2,2′-bipyridine)iron(II)]". Acta Crystallographica Section C Structural Chemistry 78, № 8 (2022). http://dx.doi.org/10.1107/s2053229622006908.

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Abstract:

The title metal–organic polymer, catena-poly[[(5,5′-dimethyl-2,2′-bipyridine-κ2 N,N′)iron(II)]-di-μ-azido-κ2 N 1:N 3-[(5,5′-dimethyl-2,2′-bipyridine-κ2 N,N′)iron(II)]-di-μ-azido-κ2 N 1:N 1], [Fe(N3)2(C12H12N2)] n , features alternating μ-1,1 (end-on mode of coordination) and μ-1,3 (end-to-end mode of coordination) double azide bridges, forming chains running in the [100] direction. The octahedral coordination geometry around the FeII centre is completed by a bidentate 5,5′-dimethyl-2,2′-bipyridine ligand. Two polymorphs for this compound were obtained from the crude reaction product, the first

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