Synthesis and structures of TiCl2(2-OC6H4OCH3)(2) and [TiCl2(2-OC6H4OCH3)(mu-Cl)](2) and stepwise reactions of [TiCl2(2-OC6H4OCH3)(mu-Cl)](2) with 2-propanol

Reaction of TiCl4 with 2 or 1 molar equiv. of 2-methoxyphenol gives the com plex TiCl2(2-OC6H4OCH3)(2) (1) or [TiCl2(2-OC6H4OCH3)(mu-Cl)](2) (2), respe ctively. Complex 2 further reacts stepwise with 1 to 2 molar equiv, of 2-pr opanol to give the complexes [TiCl(O-i-Pr)(2-OC6H4OCH3)(mu-Cl)](2) (3) and TiCl2(O-i-Pr)(HO-i-Pr)(2-OC6H4OCH3) (4). The solid state structures of comp lexes 1 and 2 were analyzed by X-ray diffraction studies. Complexes 2, 3, a nd 4 are dynamic in solution. The variable-temperature H-1 NMR study of com plex 2 reveals the presence of two major species in solution of relative ab undance 1:2 in toluene-d(8). However, for complex 3, which differs from com plex 2 in the replacement of one Cl- ligand on both Ti moieties by one 2-pr opoxide ligand, three major species along with several minor isomers are se en in solution at low temperatures. (C) 1999 Elsevier Science S.A. All righ ts reserved.