Cyano Bridged Bimetallic Compounds of the Type M2+-NC-Fe3+ (M = Co, Ni, Cu, Zn, Cd) Using the [Fe(CN)6]3- Building Block and their Antibacterial Evaluation

Reactions between [M(L)]2+ [M= Cu(II), Co(II), Cd(II), Zn(II) and Ni(II)] and [Fe(CN)6]3- give rise to cyano-bridged assembled bimetallic complexes. Their structures have been proposed by elemental analyses, IR, UV-VIS and 13C NMR spectra, conductance and magnetic measurements studies. The structure is supposed to consist of zigzag chains formed by an alternate array of the cations and [Fe(CN)6]3- anion having neutral Ni3Fe2 units. Each hexacyanoferrate(III) ion connects three nickel(II) ions using three cis CN- groups and the remaining CN- groups are terminal. The bridging cyanide ligands co-ordinate to the metal ion in a trans fashion forming trans-ML(CN)2 moieties. Antibacterial activity of some of the prepared complexes has also been investigated against three human pathogen bacteria.