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1.
Mercury(II) complexes with 4,4′‐bipyridine (4,4′‐bipy) ligand were synthesized and characterized by elemental analysis, and IR, 1H‐ and 13C‐NMR spectroscopy. The structures of the complexes [Hg3(4,4′‐bipy)2(CH3COO)2(SCN)4]n ( 1 ), [Hg5(4,4′‐bipy)5(SCN)10]n ( 2 ), [Hg2(4,4′‐bipy)2(CH3COO)2]n(ClO4)2n ( 3 ), and [Hg(4,4′‐bipy)I2]n ( 4 ) were determined by X‐ray crystallography. The single‐crystal X‐ray data show that 2 and 4 are one‐dimensional zigzag polymers with four‐coordinate Hg‐atoms, whereas 1 is a one‐dimensional helical chain with two four‐coordinate and one six‐coordinate Hg‐atom. Complex 3 is a two‐dimensional polymer with a five‐coordinate Hg‐atom. These results show the capacity of the Hg‐ion to act as a soft acid that is capable to form compounds with coordination numbers four, five, and six and consequently to produce different forms of coordination polymers, containing one‐ and two‐dimensional networks. 相似文献
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Ann M. Chippindale Andrew R. Cowley Katherine J. Peacock 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):651-652
The title compound, [MnCl2(C10H8N2)]n, crystallizes with a two‐dimensional network constructed from linear chains of edge‐sharing MnCl4 square‐planar units cross‐linked by bidentate 4,4′‐bipyridine bridges. The Mn atom and the bipyridine moieties lie on sites with 222 crystallographic symmetry; the Cl atom lies on a twofold axis. The bipyridine molecule is twisted about the central C—C bond by 33.5 (3)°. 相似文献
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Sakthivel Kandaiah Eva‐Maria Peters Martin Jansen Prof. Dr. Dr.h.c. 《无机化学与普通化学杂志》2008,634(14):2483-2486
In this paper we report on the potential dependent electrocrystallization of [Ag(4,4′‐dimethyl‐2,2′‐bipyridine)2(NO3)2] ( 1 ) and Ag(4,4′‐dimethyl‐2,2′‐bipyridine)(NO3)2 ( 2 ) from the same electrolytic bath. Thus it has been shown for the first time that the coordination number of silver ion to ligands can be tuned by the electrocrystallization potential. The single crystal structure analysis [ 1 : C2/c, a = 18.6308(15), b = 14.5708(12), c = 11.5867(10) Å, β = 126.5910(10)°, Z = 4, R = 3.9 %] [ 2 : P21/c, a = 8.5865(11) b = 11.0157(14) c = 16.4554(10) Å, β = 111.102(10), Z = 4 , R = 3.5 %] show divalent silver to be in an approximately square planar surrounding. Both complexes are paramagnetic following Curie's law with magnetic moments of 1.86 μB and 1.72 μB respectively. 相似文献
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The structure of [Zn(S2CNEt2)2]2(4,4′‐bipy) shows two independent dimeric molecules, one located about a centre of inversion, the other lying on a two fold axis containing the zinc atoms. Bidentate coordination by the dithiocarbamate ligands and a distorted square pyramidal geometry are found for two of zinc atoms whereas for the third zinc atom, the geometry is intermediate between square pyramidal and trigonal bipyramidal, a result that underscores the flexibility of coordination in these systems. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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Xiang‐Rong Hao Zhong‐Min Su Ya‐Hui Zhao Kui‐Zhan Shao Yong Wang 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):m469-m471
A novel cadmium(II) coordination polymer, poly[[[bis(4,4′‐bipyridine)cadmium(II)]‐μ3‐4,4′‐dicarboxybiphenyl‐3,3′‐dicarboxylato] 0.35‐hydrate], {[Cd(C16H8O8)(C10H8N2)2]·0.35H2O}n, was obtained by reaction of Cd(CH3COO)2·3H2O, 4,4′‐bipyridine (4,4′‐bpy) and biphenyl‐3,3′,4,4′‐tetracarboxylic acid (H4L) under hydrothermal conditions. Each CdII atom lies at the centre of a distorted octahedron, coordinated by four O atoms from three H2L2− ligands and N atoms from two monodentate 4,4′‐bpy ligands. Each H2L2− ligand coordinates to three CdII atoms through two carboxylate groups, one acting as a bridging bidentate ligand and the other in a chelating bidentate fashion. Two Cd atoms, two H2L2− anions and four 4,4′‐bpy ligands form a ring dimer node, which links into an extended broad zonal one‐dimensional chain along the c axis. 相似文献
7.
Evgen V. Govor Andrey B. Lysenko Konstantin V. Domasevitch 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(5):m201-m204
New coordination compounds with the 4,4′‐bi‐1,2,4‐triazole ligand (btr), namely tetraaqua‐2κ4O‐di‐μ2‐4,4′‐bi‐1,2,4‐triazole‐1:2κ2N1:N1′;2:3κ2N1:N1′‐hexachlorido‐1κ3Cl,3κ3Cl‐trizinc(II), [Zn3Cl6(C4H4N6)2(H2O)4], (I), and poly[cadmium(II)‐μ2‐4,4′‐bi‐1,2,4‐triazole‐κ2N1:N2‐di‐μ2‐chlorido], [CdCl2(C4H4N6)]n, (II), reveal an unprecedented molecular zwitterionic structure for (I) and a polymeric two‐dimensional layer structure for (II). Differences between these products, which involve the formation of either charge‐separated chlorometallate/aquametal fragments or complementary organic and inorganic bridges, are attributable to the hardness–softness characters of the metal cations. In (I), two N1,N1′‐bidentate btr molecules connect one [Zn(H2O)4]2+ cation and two [ZnCl3]− anions into a linear trizinc motif (the Zn atom of the cation occupies a centre of inversion in an N2O4 coordination octahedron, whereas the Zn atom of the anion possesses a distorted tetrahedral Cl3N environment). In (II), the distorted vertex‐sharing CdCl4N2 octahedra are linked into binuclear [Cd2(μ2‐Cl)(μ2‐btr)2]3+ fragments by unprecedented N1:N2‐bidentate btr double bridges and bridging chloride ligands, while the additional chloride anions are also bridging, providing further propagation of the fragments into a two‐dimensional network [Cd—Cl = 2.5869 (2)–2.6248 (7) Å]. 相似文献
8.
The cadmium(II) 4‐sulfobenzoate complex with 4,4′‐bipyridine, {[Cd2(4,4′‐bipy)4(4‐sb)2(H2O)3] · 4H2O}n, has been synthesized and characterized by elemental analysis, IR, DTA‐TG, fluorescence analysis, powder X‐ray analysis, and single‐crystal X‐ray structural determination. Structural analysis showed that the complex contains two Cd atoms in an unsymmetrical unit. The Cd1 atom displays a seven‐coordinated geometry, which is a capped anti‐trigonal prismatic structure, whereas the Cd2 atom has an octahedral coordination. The 4,4′‐bipyridine ligands in the complex have three coordination behaviors, i.e., monodentate, dimeric linker, and polymeric bridge, which is the first example showing three coordinative functions for 4,4′‐bipyridine ligands in one complex. Moreover, three coordinative functions of 4,4′‐bipyridine ligands in this polymer lead to abundant weak interactions and novel fluorescent properties, which is benefit for design and preparation of functional materials in specific usage. 相似文献
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Effects of Different Amount of Crystalline Solvate Molecules on Solid Structures and Photophysical Properties of a Platinum(II) Moiety with 4,4′‐Dibromo‐2,2′‐Bipyridine Ligand 下载免费PDF全文
Xu‐Qiao Gai Xiao‐Xin Zhang Jia‐Jia Kang Liang Xu Jian‐Jun Zhang Jun Ni 《无机化学与普通化学杂志》2016,642(8):597-602
A platinum(II) complex Pt(DiBrbpy)Cl2 ( 1 ) based on 4,4′‐dibromo‐2,2′‐bipyridine ligand was synthesized and characterized. Interestingly, two solvated phases of 1 with different amounts of crystalline CH2Cl2 molecules, 1· 1/3(CH2Cl2) (yellow) and 1· 3/2(CH2Cl2) (red), were obtained. In the solid state, 1· 1/3(CH2Cl2) exhibits a 3D supramolecular structure based on Pt(DiBrbpy)Cl2 monomer and emits a weak yellow luminescence at 541 nm (579, sh). In contrast, 1· 3/2(CH2Cl2) displays a 2D layer structure based on Pt(DiBrbpy)Cl2 dimeric units and has a strong red luminescence centered at 624 nm. The results show that crystalline solvate molecule amount can not only influence the packing structures but also photophysical properties of the platinum moiety in solid state. Furthermore, the absorption and luminescence spectra of both phases were studied by TD‐DFT calculations. 相似文献
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Masako Kato Mana Ikemori 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(1):m25-m26
The title compound, [PtCl2(C28H44N2)], is a new square‐planar PtII complex containing a bipyridine moiety with two long alkyl‐chain substituents. The complex forms a segregated packing structure made up of the alkyl‐chain layers and paired coordination sites. 相似文献
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John A. Schlueter Russell J. Funk Urs Geiser 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(6):m304-m306
In the title compound, (C10H9N2)2[Pt(CN)6]·2C10H8N2 or [(Hbpy)+]2[Pt(CN)6]2−·2bpy, where bpy is 4,4′‐bipyridine, the Hbpy+ cations and bpy molecules form a hydrogen‐bonded two‐dimensional cationic approximately square grid parallel to the (110) plane. The [Pt(CN)6]2− dianions reside in the cavities within this grid, with the nitrile N atoms forming weak hydrogen bonds with the CH groups in the cationic lattice. 相似文献
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Meng Zhao Jian Su Jun Zhang Jie‐Ying Wu Yu‐Peng Tian 《Acta Crystallographica. Section C, Structural Chemistry》2015,71(9):799-803
A metal–organic framework with a novel topology, poly[sesqui(μ2‐4,4′‐bipyridine)bis(dimethylformamide)bis(μ4‐4,4′,4′′‐nitrilotribenzoato)trizinc(II)], [Zn3(C21H12NO6)2(C10H8N2)1.5(C3H7NO)2]n, was obtained by the solvothermal method using 4,4′,4′′‐nitrilotribenzoic acid and 4,4′‐bipyridine (bipy). The structure, determined by single‐crystal X‐ray diffraction analysis, possesses three kinds of crystallographically independent ZnII cations, as well as binuclear Zn2(COO)4(bipy)2 paddle‐wheel clusters, and can be reduced to a novel topology of a (3,3,6)‐connected 3‐nodal net, with the Schläfli symbol {5.62}4{52.6}4{58.87} according to the topological analysis. 相似文献
14.
Seog Joo Kang Sung Il Hong Chong Rae Park 《Journal of polymer science. Part A, Polymer chemistry》2000,38(4):775-780
To prepare thermally stable and high‐performance polymeric films, new solvent‐soluble aromatic polyamides with a carbamoyl pendant group, namely poly(4,4′‐diamino‐3′‐carbamoylbenzanilide terephthalamide) (p‐PDCBTA) and poly(4,4′‐diamino‐3′‐carbamoylbenzanilide isophthalamide) (m‐PDCBTA), were synthesized. The polymers were cyclized at around 200 to 350 °C to form quinazolone and benzoxazinone units along the polymer backbone. The decomposition onset temperatures of the cyclized m‐ and p‐PDCBTAs were 457 and 524 °C, respectively, lower than that of poly(p‐phenylene terephthalamide) (566 °C). For the p‐PDCBTA film drawn by 40% and heat‐treated, the tensile strength and Young's modulus were 421 MPa and 16.4 GPa, respectively. The film cyclized at 350 °C showed a storage modulus (E′) of 1 × 1011 dyne/cm2 (10 GPa) over the temperature range of room temperature to 400 °C. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 775–780, 2000 相似文献
15.
Evgeniy V. Govor Andrey B. Lysenko Konstantin V. Domasevitch Eduard B. Rusanov Alexander N. Chernega 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(3):m117-m120
The coordination polymers catena‐poly[[[(4,4′‐bi‐1,2,4‐triazole‐κN1)bis(thiocyanato‐κN)copper(II)]‐μ‐4,4′‐bi‐1,2,4‐triazole‐κ2N1:N1′] dihydrate], {[Cu(NCS)2(C4H4N6)2]·2H2O}n, (I), and poly[tetrakis(μ‐4,4′‐bi‐1,2,4‐triazole‐κ2N1:N1′)bis(μ‐thiocyanato‐κ2N:S)tetrakis(thiocyanato‐κN)tricadmium(II)], [Cd3(NCS)6(C4H4N6)4]n, (II), exhibit chain and two‐dimensional layer structures, respectively. The differentiation of the Lewis acidic nature of CuII and CdII has an influence on the coordination modes of the triazole and thiocyanate ligands, leading to topologically different polymeric motifs. In (I), copper ions are linked by bitriazole N:N′‐bridges into zigzag chains and the tetragonal–pyramidal CuN5 environment is composed of two thiocyanate N atoms and three triazole N atoms [basal Cu—N = 1.9530 (18)–2.0390 (14) Å and apical Cu—N = 2.2637 (15) Å]. The structure of (II) contains two types of crystallographically unique CdII atoms. One type lies on an inversion center in a distorted CdN6 octahedral environment, with bitriazole ligands in the equatorial plane and terminal isothiocyanate N atoms in the axial positions. The other type lies on a general position and forms centrosymmetric binuclear [Cd2(μ‐NCS‐κ2N:S)2(NCS)2] units (tetragonal–pyramidal CdN4S coordination). N:N′‐Bridging bitriazole ligands link the Cd centers into a flat (4,4)‐network. 相似文献
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Yi‐Hang Wen Jian‐Kai Cheng Jian Zhang Zhao‐Ji Li Yuan‐Gen Yao 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(12):m618-m619
The title compound, (C10H10N2S)[CuCl4], was obtained by the reaction of cupric chloride with pyridine‐4‐thiol in a mixture of acetonitrile and tetrahydrofuran, suggesting that the desulfurization and coupling reactions of pyridine‐4‐thiol occurred in the presence of the Cu2+ ion. X‐ray diffraction analysis reveals the presence of one 4,4′‐thiodipyridinium cation, H2bps2+, and one [CuCl4]2− anion. The cations interact with the anions via N—H⋯Cl hydrogen‐bonding interactions to form a closed `chair' conformation. 相似文献
18.
The structure of Zn[S2CN(CH2Ph)2]2(2,2′‐bipy) features a distorted trigonal prismatic geometry around the zinc centre defined by an N2S4 donor set; the molecule has two‐fold symmetry. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
19.
Jia‐Geng Liu Jing‐Jing Nie Duan‐Jun Xu Yuan‐Zhi Xu Jing‐Yun Wu Michael Y. Chiang 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(4):354-355
The title complex, [CuCl2(C6H6N4S2)], has a flattened tetrahedral coordination. The CuII atom is located on a twofold rotation axis and is coordinated by two N atoms from a chelating 2,2′‐diamino‐4,4′‐bi‐1,3‐thiazole ligand and by two Cl atoms. Intramolecular hydrogen bonding exists between the amino groups of the 2,2′‐diamino‐4,4′‐bi‐1,3‐thiazole ligand and the Cl atoms. The intermolecular separation of 3.425 (1) Å between parallel bithiazole rings suggests there is a π–π interaction between them. 相似文献
20.
Christine Kallweit Prof. Dr. Gebhard Haberhauer Sascha Woitschetzki 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(21):6358-6365
A chirality switch in which the intrinsic chirality of a 4,4′‐bipyridine is combined with a metal‐ion‐induced switching principle is described. In the uncomplexed state the 4,4′‐bipyridine unit, which is linked to an S,S,S,S‐configured cyclic imidazole peptide, is P‐configured. The addition of zinc ions leads to a rotation around the C?C bond axis of the 4,4′‐bipyridine and the M isomer of the metal complex is formed. By addition of a stronger complexing agent the metal ions are removed and the switch returns to its initial position. The combination of the chirality switch with a second switching unit allows the construction of a molecular pushing motor, which is driven chemically and by light. 相似文献