Tritertiary arsine complexes of titanium(IV) and zirconium(IV) halides

Abstract

Compounds formed by the tritertiary arsine ligand methylbis(3-dimethyl- arsinylpropyl)arsine (tas) with titanium tetrahalides (where the halide is F, Cl, Br, or I) and zirconium tetrabromide are described. Titanium and zirconium tetrabromide yield isomorphous crystals of the neutral diamagnetic complexes (MBr₄ tas), which are believed to be seven- coordinate, The complexes [(TiF₄)₃ tas], [(TiCl₄)₂ tas], and [TiI₃ tas]I have been isolated and their physical properties and possible structures are discussed.