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Ming‐Liang Tong Xiao‐Ming Chen Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(9):m481-m482
In the title compound {alternative name: poly[silver(I)‐μ‐(3‐amino‐2‐chloropyridine)‐μ‐nitrato]}, [Ag(NO3)(C5H5ClN2)]n the AgI atom is in an irregular AgN2O3 geometry, surrounded by one pyridyl N atom [Ag—N 2.283 (5) Å], one amine N atom [Ag—N 2.364 (6) Å] and three O atoms from different nitrate ions [Ag—O 2.510 (6)–2.707 (6) Å]. The Ag ions are bridged by the 3‐amino‐2‐chloropyridine ligands into helical chains. Adjacent uniform chiral chains are further interlinked through the NO3 bridges into an interesting two‐dimensional coordination network in the solid. 相似文献
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Ionel Haiduc Gellert Mezei Rodica Micu‐Semeniuc Frank T. Edelmann Axel Fischer 《无机化学与普通化学杂志》2006,632(2):295-300
The three (O‐methyl)‐p‐ethoxyphenyldithiophosphonato triphenylphosphine complexes of copper, silver and gold, [(Ph3P)nM{S2P(OMe)C6H4OEt‐p}] (M = Cu, n = 2; M = Ag, Au, n = 1) investigated structurally by X‐ray diffraction exhibit remarkable structural differences. The copper compound is a four‐coordinate chelate monomer with Cu–S 2.4417(6) and 2.5048(6) Å; P–Cu–S 104.24(2)–114.01(2)°; Cu–S–P 82.49(3)° and 80.85(2)°. The silver compound is a cyclic dimer with bridging dithiophosphonato ligands and three‐coordinate silver atoms [Ag–S 2.5371(5) and 2.6867(5) Å; P–Ag–S 122.88(2)° and 122.17(2)°; Ag–S–P 89.32(2)° and 103.56(2)°]. The gold compound is monomeric with linear dicoordinate gold [Au–S 2.3218(6) Å; P–Au–S 177.72(2)°, Au–S–P 100.97(3)°]. 相似文献
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Alfred Muller Stefanus Otto 《Acta Crystallographica. Section C, Structural Chemistry》2011,67(5):m165-m168
The isomorphous crystal structures of the title compounds, [Fe2M(C5H5)2(C17H14P)Cl(CO)]·CH2Cl2 or trans‐[MCl(CO)(PPh2Fc)2]·CH2Cl2 (M = Rh or Ir, and Fc is ferrocenyl), are reported. The data collection for M = Rh was performed at 293 (2) K, while the M = Ir data were collected at 160 (2) K. The compounds crystallize with two independent half‐molecules in the asymmetric unit, both occupying inversion centres, and are accompanied by a single dichloromethane molecule on a general position. Due to the symmetry, there is 0.50/0.50 disorder present in the chloride and carbonyl positions. One molecule in each structure also has a second type of disorder in the chloride and carbonyl positions, which was refined over another two positions of equal distribution. The steric impact of the bulky PPh2Fc ligands was evaluated using the Tolman cone‐angle model, resulting in an average value of 172° for the four molecules in both structures. 相似文献
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Stefanus Otto Andreas Roodt 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(12):m565-m566
The crystal structure of the title compound, [RhI(C18H15Sb)3(CO)], represents a rare example of a crystallographically characterized five‐coordinate RhI–SbPh3 complex. The compound crystallizes with the I—Rh—CO core on a threefold rotation axis, with three crystallographically equivalent triphenylstibine ligands. Selected geometric parameters are: Rh—I = 2.7159 (8), Rh—Sb = 2.5962 (4), Rh—CCO = 1.825 (6) and CCO—O 1.153 (6) Å, and Sb—Rh—I = 89.374 (10) and Sb—Rh—CCO = 90.626 (10)°. The cone angle of the SbPh3 ligand was determined as 137°, according to the Tolman model. 相似文献
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Olof Kristiansson 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):165-167
The bis(4‐aminopyridine)silver(I) cation in [Ag(C5H6N2)2]NO3 has the Ag atom on a twofold axis and displays an N—Ag—N angle of 174.43 (15)° and an Ag—N distance of 2.122 (3) Å. The two ligands are planar and the angle between the two ligand planes is 79.45 (9)°. The pyridine rings are stacked in piles with an interplanar distance of 3.614 (5) Å, a distance that strongly suggests that pyridine π–π interactions have an appreciable importance with respect to the non‐bonded crystal organization. The tris(2,6‐diaminopyridine)silver(I) cation in [Ag(C5H7N3)3]NO3 has Ag—N distances of 2.243 (2), 2.2613 (17) and 2.4278 (18) Å, and N—Ag—N angles of 114.33 (7), 134.91 (7) and 114.33 (7)°. The Ag+ ion is situated 0.1531 (2) Å from the plane defined by the three pyridine N atoms. 相似文献
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Ioanna Chalari Nikos Hadjichristidis 《Journal of polymer science. Part A, Polymer chemistry》2002,40(10):1519-1526
The synthesis of second‐generation (G‐2) dendritic polymers of isoprene (I) and styrene (S) was achieved with anionic polymerization high‐vacuum techniques and by performing the following steps: (1) selective reaction of a living chain with the chlorosilane group of 4‐(chlorodimethylsilyl)styrene (a dual‐functionality compound) to produce a macromonomer, (2) addition of a second living chain (same or different) to the double bond of the macromonomer, (3) polymerization of I with the anionic sites, and (4) reaction of the produced off‐center living species with trichloromethyl silane or tetrachlorosilane (CH3SiCl3 or SiCl4). The combined characterization results showed that the G‐2 dendritic macromolecules synthesized—(S2I)3, (SI′I)3, (I″I′I)3, (I′2I)4—have a high molecular and compositional homogeneity. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 1519–1526, 2002 相似文献
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Ibrahim Abdul Razak S. Shanmuga Sundara Raj Hoong‐Kun Fun Fangfang Jian Fengli Bei Xujie Yang Lude Lu Xin Wang 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):666-667
In the title compound, [Au(C6H10NS2)(C18H15P)2], the Au atom is in a distorted tetrahedral environment, with the two P atoms of the triphenylphosphine ligands and the S atoms of the bidentate piperidinecarbodithioate ligand occupying the vertices. The piperidine ring adopts a chair conformation. 相似文献
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Irene Ara Fatima El Bahij Mohamed Lachkar 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(7):m265-m267
The title compound, [Ag(C3H5OS2)]n, is polymeric in the solid state and adopts a layered structure in which each Ag atom is five‐coordinated in a distorted trigonal‐bipyramidal geometry defined by four S atoms belonging to four different xanthate groups and by a neigbouring Ag atom [Ag⃛Ag = 3.0540 (8) Å]. Each S atom is three‐coordinated to one C and two Ag atoms. The structure can be envisaged as being formed by Ag2(S2COEt)2 units in which every S atom is bonded to another Ag atom from a different unit and the Ag atoms are also bonded to two different S atoms of two other units. The result is a two‐dimensional network of condensed metallacycles of six or eight atoms. 相似文献
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Black crystals of [Rb(crypt‐2,2,2)]4(I5)2(I8) were obtained from a dichloromethane/ethanol solution of RbI, I2 and Kryptofix‐2,2,2®. The crystal structure (monoclinic, P21/c (no. 14), a = 1250.1(1), b = 2555.2(2), c = 2313.4(3) pm, β = 121.45(1)°, V = 6309.9(11)·106 pm3, Z = 2) consists of [Rb(crypt‐2,2,2)]+ cations leaving three‐dimensional channels for the V‐shaped (I5)? and Z‐shaped (I8)2? anions which are isolated from each other. 相似文献
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Single crystals of [Cu(ATSC)]NH2SO3 ( 1 ) (ATSC –4‐allylthiosemicarbazide) were obtained by electrochemical synthesis using alternating current. Compound ( 1 ) crystallizes in P212121 sp. gr., a = 6.8284(2), b = 9.3054(3), c = 16.1576(11) Å, Z = 4. ATSC moiety acts as tetradentate ligand, chelating two symmetrically related copper atoms. The Cu atom possesses trigonal pyramidal coordination, formed by two sulphur atoms (one of them at the apical position), nitrogen atom and C=C bond. Sulfamate anion is associated via hydrogen bonds. By slow hydrolysis of 1 crystals of [Cu2(ATSC)2]SO4 ( 2 ) were obtained: P 1 sp. gr., a = 9.526(2), b = 12.687(2), c = 14.7340(10) Å, α = 95.119(10), β = 89.903(12), γ = 109.113(14)°, Z = 4. The asymmetric unit of 2 contains two formula units, which are related by pseudosymmetry via a glide plane a. One half of four ATSC molecules act as in 1 , the rest as tridentate ligands, which coordinate the two copper atoms in apical positions with sulfate anions. This Cu–S coordination was to date unknown. The structure of the ATSC ligands contributes to the unexpected competitiveness of C=bond in the coordination sphere of CuI inspite of strong donor atoms. 相似文献