Titanium tetrachloride binding and making arenes from acetylenes: the synthesis and X-ray crystal structure of a titanium( IV )–hexamethylbenzene complex

Concentrated solutions of TiCl4 in CH2Cl2, o-C6H4Cl2, and n-hexane reacted with hexamethylbenzene producing [(η6-C6Me6)TiCl3]+[Ti2 Cl9]–, which can equally well be obtained from the same TiCl4 solutions and but-2-yne.