Studies on transition-metal cyano-complexes. Part I. Octacyanoniobates(III), -niobates(IV), -molybdates(V), and -tungstates(V)

Abstract

The preparation and properties of salts of [Nb(CN)8]n–(n= 4 or 5) are described. E.p.r. spectra of [Nb(CN)8]4– salts indicate a change in configuration from D2d in the solid state to D4d in solution. The vibrational and electronic spectra of these cyanoniobates are reported and support these structural changes. E.p.r. and vibrational spectra of [M(CN)8]3–(M = Mo or W) salts in the solid state and in solution are also given.