Transition-metal dithiolene complexes. Part IV. Trisdicyano-1,2-dithiolene complexes of first-row metals, and of molybdenum and tungsten

Abstract

The syntheses and chemical properties of several new trisdicyano-1,2-dithiolene complexes of transition metals are described. These complexes have anions of the type [MS₆C₆(CN)₆]^z where M = Mn, Fe, Mo, and W and z=–2 and M = Fe and Co where z=–3. An improved synthesis of the known [CrS₆C₆(CN)₆]^2– is reported. The behaviour of some of the dianions with reducing agents is reported and some evidence for an apparently bis-substituted manganese complex [MnS₄C₄(CN)₄]^2– is presented. Voltammetric, spectral, and magnetic results obtained from these complexes and from [VS₆C₆(CN)₆]^2–, [CrS₆C₆(CN₆)]^2–, and [CoS₆C₆(CN)₆]^3– are reported and discussed.