Novel heterometallic Cd/Cu complexes prepared using zerovalent copper: control of the nuclearity and structural diversity by halide counterions

E. A. Vinogradova, O. Vassilyeva, V. N. Kokozay, B. Skelton, Jens K. Bjernemose, P. Raithby
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引用次数: 41

Abstract

Three kinds of CdII/CuII compounds of different nuclearity: tetranuclear [Cd2Cu2I4L4(dmso)2] 1, pentanuclear [Cd2Cu3Br6L4(dmso)2] 2 and hexanuclear [Cd4Cu2Cl6L6(H2O)2] 3, have been synthesised by the reaction of zerovalent copper and cadmium halides with non-aqueous (dmso, CH3CN) solutions of 2-dimethylaminoethanol (HL) in air. The choice of counteranion in the initial cadmium salt provides a useful method of altering the nuclearity and structure of the heterometallic Cd/Cu complexes. Crystallographic investigations reveal that 1 has a centrosymmetric tetranuclear structure with a zig-zag Cd–Cu–Cu–Cd skeleton. The molecular structure of 2 consists of a pentanuclear centrosymmetric core in which four metal atoms are linked together by bridging oxygen atoms of L groups and bromide anions to form a parallelogram Cu–Cd–Cu–Cd centred on the fifth Cu. The hexanuclear complex 3 is made up of two symmetry-related units with triangular CuCd2 cores linked by amino alkoxo bridges, involving cadmium centres of both units.
用零价铜制备的新型异金属Cd/Cu配合物:卤化物反离子对核性和结构多样性的控制
用零价铜和镉卤化物与空气中2-二甲氨基乙醇(HL)的非水(dmso, CH3CN)溶液反应合成了三种不同核数的CdII/CuII化合物:四核[Cd2Cu2I4L4(dmso)2] 1、五核[Cd2Cu3Br6L4(dmso)2] 2和六核[Cd4Cu2Cl6L6(H2O)2] 3。在初始镉盐中选择反阴离子为改变异金属Cd/Cu配合物的核性和结构提供了一种有用的方法。晶体学研究表明,1具有中心对称的四核结构,具有锯齿形的Cd-Cu-Cu-Cd骨架。2的分子结构由一个五核中心对称核心组成,其中四个金属原子通过L基氧原子和溴离子的桥接连接在一起,形成以第五个Cu为中心的平行四边形Cu - cd - Cu - cd。六核配合物3由两个对称相关的单元组成,三角形的CuCd2核由氨基烷氧基桥连接,两个单元的镉中心都参与其中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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