Synthesis and properties of cyano-bridged nickel(II)-iron(III) complexes

Summary Four kinds of novel CN-bridged Ni^II-Fe^III complexes, NiLn(NC)Fe(CN)₅] ^–, have been synthesized and characterized by elemental analysis, i.r. and u.v.-vis. spectral analysis, and magnetic moments. The formation of cyanide bridges is evident from the i.r. and u.v.-vis. spectra by the appearance of v(CN) shifts and changes in _max with respect to the mononuclear parent complex Fe(CN)₆]^3–. The magnetic properties indicate the existence of magnetic spin interactions between Ni^II and Fe^III through the cyanide bridge.