摘要
用新合成法制备的新型配体三苯基乙荒酸四乙基铵盐(Ⅰ)和 AgNO_3在不同条件下反应分别获得单核银络合物Et_4N^+[Ag(Ph_3CCS_2)_2]^-·2 THF(晶体Ⅱ)和六核银簇合物Ag_6(Ph_3CCS_2)_6·Py.6DMF(晶体Ⅲ)。用X射线单晶衍射法测定了它们的晶体结构。
The title two complexes have been synthesized by the reaction of AgNO3 under-different conditions with tetraethylamonium dithiotriphenylacetate, which was preparedby a new method.The structures of the two complexes were determined by a single-crystal X-ray diffraction analysis. The crystal of Et4N+[Ag(Ph3CCS2)2]-·2THF belongs to triclinic space group P1 with unit cell parameters. a = 9.125(2), b = 9.925(2), c = 15.607(3)A, α= 73.59(2),β=73.95(1), γ = 77.11(1)°, Z = 1, D0 = 1.32g/cm3. The structure was refined to R = 0.067 for 260∈reflections. The crystal of Ag6(Ph3CCS2)6·Py·6DMF belongs to cubic space group P2/n3 with unit cell parameters. a = 24.017(3)A, Z = 4, Dc = 1.50g/cm3. The structure was refined to R = 0.050 for 721 reflections.In the anionic complex [Ag(Ph3CCS2)2]-, the silver coordination geometry is linear. Only one of the two sulfur atoms in the ligand is coordinated to the silver atom. The molecule of hexanuclear silver dithiotriphenylacetate Ag6(Ph3CCS2)6 has 3 symmetry. The Ag6 configuration is a octahedron flattened in its axial direction, with six comparatively short and six longer edges. The Ag-Ag distances bridged (3.512A Av.) are longer than the nonbridged (2.975A Av.). The silver coordination is treefold but not planar, the metal atoms being situated 'inside' the plane of the coordinating sulfur atoms 0.44A.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1990年第2期173-182,共10页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
关键词
六核银簇合物
银
络合物
晶体结构
Syntheses
Crystal structure
Hexanuclear silver cluster
Anionic silver complex
Dithiotriphenylacetate
