Cadmium complexation by aspartate.: NMR studies and crystal structure of polymeric Cd(AspH)NO3

Two cadmium compounds containing the aspartate ligand are described, with compositions Cd(AspH)NO3 and Cd(Asp). The crystal structure of the first shows it is a two dimensional polymer in which each cadmium is coordinated to seven oxygen atoms, four from carboxylates and three from the nitrate moiety which acts both as a chelate and as a bridging ligand. For Cd(Asp), Cd-111 NMR studies suggests the presence of Cd-NH2 interaction. (C) 2002 Published by Elsevier Science Ltd.