Studies in the stereochemistry of zinc(II). IV. Complexes of zinc halides with heterocyclic bases

Abstract

Complexes of zinc halides with heterocyclic bases of the types ZnX₂B₂, ZnX₂B₃, and ZnX₂B₄ have been prepared, where X = Cl, Br, I, or NCS and B = pyridine, 4-methylpyridine, or 2-methylpyridine. Infrared spectra and isomorphous incorporation of cobalt(II) indicate that in the solid state these compounds are tetrahedral, 5-coordinate, and octahedral respectively. Molecular weights and conductivities in nitrobenzene solution show that the compounds ZnX₂B₃ and ZnX₂B₄ dissociate in solution to ZnX₂B₄ and free base.