Synthesis and X-ray Crystal Structure of Polymeric and Dimeric Copper(I) Cyanide Complexes Incorporating A Bicyclic Guanidine Ligand

Coles, Martyn and Hitchcock, Peter B (2001) Synthesis and X-ray Crystal Structure of Polymeric and Dimeric Copper(I) Cyanide Complexes Incorporating A Bicyclic Guanidine Ligand. Polyhedron, 20 (24-25). 3027 - 3032. ISSN 0277-5387

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Abstract

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 [Cu2(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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Martyn Coles
Date Deposited: 06 Feb 2012 18:46
Last Modified: 19 Mar 2012 15:27
URI: http://sro.sussex.ac.uk/id/eprint/18298
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