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.