Unusual six- and eight-coordinated cadmium(II) malonate complex: Relevance to 113Cd NMR probe of metal binding sites on metalloproteins

Abstract

The Cd NMR spectrum of polymeric tetraaquobis(malonato) dicadmium(II) 1 is characterized by two resonances and its crystal structure shows two cadmium sites in distinct chemical environments; the six- and eight-coordinate sites formed by oxygen donors are correlated with chemical shifts at δ 18 and -107, respectively.