Synthese und Strukturuntersuchung von Polyhalogeniden im System Iod/Brom / Syntheses and Structure Analyses of Polyhalides in the System Iodine/Bromine
Synthese und Strukturuntersuchung von Polyhalogeniden im System Iod/Brom / Syntheses and Structure Analyses of Polyhalides in the System Iodine/Bromine
复制标题
碘/溴系统中多卤化物的合成和结构分析 / 碘/溴系统中多卤化物的合成和结构分析
DOI：
--
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
H. Hartl
中科院分区：
文献类型：
--
作者：
A. Parlow;H. Hartl
以2，2‘-联吡啶(BPh+)为阳离子，合成了几种含碘和溴的多卤阴离子。用X-射线晶体结构分析方法研究了三个化合物的晶体结构。BPh+(H3O)+(IBr2)2-(P1̄，a=780.0(3)，b=815.4(3)，c=1547.9(6)pm，α=75.59(7)，β=82.28(8)，γ=88.15(8)°，R=6.5%)含有两个独立的、近线性的、不对称的IBr2-基团。在BPh+I2Br3-(P21/c，a=1269.1(6)，b=673.0(4)，c=2047.4(8)pm，β=112.39(9)°，R=6.3%)中，该阴离子与其他五卤化物阴离子一样呈V形。它的特征是由两个IBR分子连接到一个溴离子上，在中心原子上有较长的I-Br键。[xxx](P21/m，a=435.1(2)，b=1710.6(7)，c=1349.0(6)pm，β=97.56(9)°，R=15.5%)中的多卤化物阴离子形成无限的锯齿状结构。它们是由碘分子连接的IBr2-阴离子组成的。阳离子被包裹在这些层内的柱状空腔中。
Several polyhalide anions containing iodine and bromine have been synthesized with 2,2′- bipyridylium (BPH+) as the cation. The crystal structures of three compounds have been investigated by X-ray crystal structure analyses. BPH+(H3O)+(IBr2)2- (P1̄, a = 780.0(3), b = 815.4(3), c = 1547.9(6) pm, α = 75.59(7), β = 82.28(8), γ = 88.15(8)°, R = 6.5%) contains two independent, nearly linear, asymmetric IBr2- groups. In BPH+I2Br3- (P21/c, a = 1269.1(6), b = 673.0(4), c = 2047.4(8) pm, β = 112.39(9)°, R = 6.3%), the anion is V-shaped like other pentahalide anions. It can be characterized as consisting of two IBr molecules linked to a bromide anion with the longer I-Br bonds at the central atom. The polyhalide anions in [xxx] (P21/m, a = 435.1(2), b = 1710.6(7), c = 1349.0(6) pm, β = 97.56(9)°, R = 15.5%) form infinite zigzag layers. They are built up by IBr2- anions which are connected by iodine molecules. The cations are enclosed in columnar cavities within these layers