| 锌银双金属硫氰酸根络合物ZnAg_2(SCN)_4的晶体结构 |
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| 引用本文： | 卢绍芳,何美云,黄金陵. 锌银双金属硫氰酸根络合物ZnAg_2(SCN)_4的晶体结构[J]. 结构化学, 1982, 0(2) |
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| 作者姓名： | 卢绍芳 何美云 黄金陵 |
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| 作者单位： | 中国科学院福建物质结构研究所(卢绍芳，何美云)，中国科学院福建物质结构研究所(黄金陵) |
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| 摘 要： | 本文报导了双金属硫氰酸根络合物ZnAg_2(SCN)_4的晶体结构。晶体属单斜晶系,空间群为Cc,晶胞参数:a=19.720(6),b=7.712(2),c=7.813(1);β=96。50°(2)°。每个晶胞含4个ZnAg_2(SCN)_(40)在CAD-4四圆衍射仪上用MoKα射线收集了I≥2σ(I)的971个独立衍射数据。晶体结构采用重原子法解出,用三维付立叶合成及全矩阵最小二乘法修正,偏离因子R为0.062。 在这一个结构冲,硫氰酸根作为三配位“桥”基,以其N端和Zn络合,以其S端同时与两个Ag络合,通过共价配键将整个结构联成三维的无穷骨架。Zn和Ag原子的邻近原子呈畸变的四面体配位构型。
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The Crystal Structure of Bimetallic Zinc (Ⅱ) Silver (Ⅰ) Tetrathiocyanate,: Complex ZnAg_2 (SCN) |
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| Abstract: | The Crystal structure of bimetallic thiocyanate complex ZnAg2(SCN)4 is reported. The crysta is monoclinic, belonging to the space group Cc and having the following cell dimensions: a = 19.720(6), b = 7.712(2), c = 7.823(1)A; β = 96.50(2)°. Each unit cell contains four molecules. Data of 971 independent reflections (I≥2σ (I)) have been collected by using MoKa radiation on a CAD4 four-circle diffractometer. The structure was solved by the heavy atom method and refined by three-dimensional Fourier syntheses and full-matrix least squares procedures to R =0.062.It is found that in this structure, the thiocyanate group is taken as a three-coordinate bridging group with its nitrogen end bonded to Zn and each sulfur atom bonded to two Ag atoms simultaneously. The whole structure is joined together through coordinated covalent bonds to form an infinite 3-di-mensional framework. Both Zn and Ag atoms have a distorted tetrahedral configuration. |
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