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Tris(triphenylphosphine)gold(I)-pentafluorosilicate(IV) ([Au{P(C6H5)3}3][SiF5]) was prepared and the structure was determined by single crystal x-ray diffraction. The complex crystallizes in the triclinic space group P1 (No. 2). The lattice constants are a = 14.634(2) Å, b = 17.180(2) Å, c = 22.212(3) Å, α = 86.48(1)°, β = 78.95(1)°, γ = 83.99(1)°. Number of molecules per cell: Z = 4. The gold atoms are coordinated to three triphenylphosphine ligands to form the trigonal planar cation [Au{P(C6H5)3}3]+. Separated from the cation is the [SiF5]? anion which is regular trigonal bipyramidal coordinated. No interactions between the fluorine atoms and the gold atoms were observed. 相似文献
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T. A. Rodina A. V. Ivanov A. V. Gerasimenko 《Russian Journal of Coordination Chemistry》2014,40(2):100-108
The chemisorption interaction between the binuclear cadmium diethyl dithiocarbamate (EDtc), [Cd2{S2CN(C2H5)2}4], (chemisorbent I) and AuCl3 solutions in 2 M HCl results in the formation of polymeric gold(III) complexes: ([Au{S2CN(C2H5)2}2][AuCl4]) n (II) and [Au{S2CN(C2H5)2}Cl2] n (III) with the same Au : EDtc : Cl ratio (1 : 1 : 2). The alternating centrosymmetric cations and anions of complex II are structurally self-assembled to form linear polymeric chains: the gold atom in [Au{S2CN(C2H5)2}2]+ forms secondary Au(1)?Cl(1) bonds (3.7784 Å) with two neighboring [AuCl4]? anions. This binding is additionally strengthened by secondary S(1)?Cl(1) interactions (3.4993 Å). The mixed-ligand complex III comprises two structurally non-equivalent molecules [Au{S2CN(C2H5)2}Cl2]: A—Au(1) and B—Au(2), each being in contact with two nearest neighbors through pairs of unsymmetrical secondary bonds: Au(1)?S(1)a/b 3.4361/3.6329; and Au(2)?S(4)c/d 3.4340/3.6398 Å. At the supramolecular level, this gives rise to independent zigzag-like polymeric chains, (?A?A?A?) n and (?B?B?B?) n along which antiparallel isomeric molecules of III alternate. The chemisorption capacity of cadmium diethyl dithiocarbamate calculated from the gold(III) binding reaction is 963.2 mg of gold per 1 g of the sorbent. The recovery conditions for the bound gold were elucidated by simultaneous thermal analysis of II and III. The DSC curves reflect different sets of heat effects, because thermolysis occurs for complex molecules (III) or for cations and anions (II). Nevertheless, the patterns of experimental TG curves are similar despite different structures of the complexes. The final product of thermal transformations is reduced gold. 相似文献
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Kunz PC Wetzel C Kögel S Kassack MU Spingler B 《Dalton transactions (Cambridge, England : 2003)》2011,40(1):35-37
The gold(I) bis-NHC (NHC = imidazol-2-ylidene) parent compound was synthesised in high yield by a three step reaction starting from imidazole. The compound is highly water soluble and stable in concentrated hydrochloric acid. 相似文献