Preparations, IR Spectra and Crystal Structures of Cyano-Bridged Bimetallic Complexes of Zinc(II) and Cadmium(II) with Tetracyanopalladate(II)

Abstract

The novel heteronuclear compounds [Zn(hydet-en)2Pd(CN)4] (1) and [Cd(hydet-en)2Pd(CN)4] (2) {hydet-en: N-(2-hydroxyethyl-ethylenediamine)} have been synthesized and characterized by elemental analyses and IR spectra. The crystal structures of 1 and 2 have been determined by X-ray diffraction. Structural analysis shows that both compounds have shown a polymeric chain, in which the Zn(II)/Pd(II) and Cd(II)/Pd(II) centres are linked by two CN groups. Both zinc and cadmium atoms are six coordinate with two trans cyanide-nitrogen and four hydet-en N atoms in a distorted octahedron arrangement; the palladium atoms in 1 and 2 are four coordinate with four cyanide-C atoms in a square planar arrangement. The chains in both compounds are connected through weak interchain hydrogen bonds, N-H ⋯ O, N-H ⋯ N and O-H ⋯ N, thereby forming a three-dimensional network. © 2007 Taylor & Francis.