Addition compounds of titanium tetrachloride with aromatic nitrogen bases

Abstract

Three reaction products of an addition reaction of titanium tetrachloride with aromatic nitrogen bases are presented. trans-Tetrachlorobis(3,4-dimethylpyridine)titanium, [TiCl 4 (C 7 H 9 N) 2 ], (I), and trans-tetrachlorobis(4-methylpyridine)titanium, [TiCl 4 (C 6 H 7 N) 2 ], (II), are both neutral complexes in which the central Ti atom is bonded to four Cl and two N atoms of two 3,4-dimethylpyridine and 4-methylpyridine ligands, respectively, resulting in a slightly distorted octahedral environment around the Ti atom. The methylpyridine ligands occupy axial positions, with the four chloro ligands in the equatorial plane. The ionic structure of bis(1-methylimidazolium) hexachlorotitanate(IV) pentachloro(N-methylimidazole-N 3 )titanate(IV), (C 4 H 7 N 2 ) 2 [TiCl 5 (C 4 H 6 N 2 )][TiCl 6 ] 0.5 , (III), consists of a pentachloro(N-methylimidazole-N 3 )titanate anion and half a [TiCl 6 ] 2- complex anion, in both of which the Ti atom appears in a nearly perfect octahedral coordination sphere with two N-methylimidazolium cations as counter-ions.