Synthesis and X-ray crystal structure of polymeric and dimeric copper(I) cyanide complexes incorporating a bicyclic guanidine ligand

被引：29

作者：

Coles, MP ^{[1
]}

Hitchcock, PB ^{[1
]}

机构：

[1] Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England

来源：

POLYHEDRON | 2001年 / 20卷 / 24-25期

关键词：

copper(I); bicyclic guanidine; bridging cyanide; polymeric chains; zwitterions;

D O I：

10.1016/S0277-5387(01)00915-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

1,3,4,6,7,8-Hexahydro-2H-pyrimido[1,2-a]pyrimidine (hppH) reacts with copper(I) cyanide to afford the polymeric chain [(hppH)CuCN]. (1), consisting of distorted trigonal planar copper atoms linked by cyanide bridges. Attempts to isolate molecular species by repeating the reaction in the presence of triphenylphosphine gave a dimeric complex of the general formula [Cu-2(CN)(2)(PPh3)(4)(hppH)] (2). The solid-state structure of 2 is consistent with a zwitterionic complex, comprising of [Cu(+)-(PPh3)(2)(hppH)] and [Cu(-)(CN)(2)(PPh3)(2)] metal centres, linked by a cyanide bridge. Variable temperature NMR studies suggest that the formation of higher oligomers may occur in solution at low temperature. (C) 2001 Published by Elsevier Science Ltd.

引用

页码：3027 / 3032

页数：6