Hetero-Octanuclear Cubane-Like and One-Dimensional Cyano Complexes with the N,N-Dimethylethylenediamine Ligand

Abstract

A series of complexes containing dmen (dmen = N,N-dimethylethylenediamine) units and cyano groups, namely bimetallic octanuclear and binuclear [Zn<inf>4</inf>(dmen)<inf>8</inf>Ni<inf>4</inf>(CN)<inf>16</inf>] (1), [Cd<inf>4</inf>(dmen)<inf>8</inf>Ni<inf>4</inf>(CN)<inf>16</inf>] (2), [Zn(dmen)<inf>2</inf>Pd(μ-CN)<inf>2</inf>(CN)<inf>2</inf>] (3) and [Cd(dmen)<inf>2</inf>Pd(μ-CN)<inf>2</inf>(CN)<inf>2</inf>] (4), have been synthesized and characterized by elemental, spectral (FT-IR and Raman) and thermal analyses techniques. The molecular structures of the complexes have been determined by the single crystal X-ray diffraction technique. The X-ray analyses of 1 and 2 show heterometallic octanuclear cubane-like structures in which Zn(II) or Cd(II) and Ni(II) ions reside in alternate corners, whereas complexes 3 and 4 display one-dimensional chain structures. © 2014 Elsevier Ltd. All rights reserved.