Hexahalogenometallates(III) of titanium, vanadium, and chromium

Abstract

Pyridinium hexahalogenometallates(III), [C₅H₆N]₃[MX₆], where M = Ti, V, and X = Cl and Br, have been prepared and characterised. Attempts to prepare tetraethylammonium salts of titanium in methyl cyanide gave [NEt₄][TiX₄,2MeCN]; thermal decomposition of these salts gave [NEt₄][TiX₄] species which appeared to contain polymeric anions with six-co-ordinate rather than tetrahedral titanium. The spectra of these salts and related species have been measured and they are discussed.