Preparation and crystal structure of the titanaspiro[7.7]heptasiloxane cis-bis(hexa-phenyltrisiloxanediolato)dipyridine-titanium bis(toluene) solvate

Abstract

The products isolated in good yield from the reactions of dilithium tetraphenyldisiloxanediolate [Ph4Si2O(OLi)2] and (a) titanium tetrachloride (with subsequent addition of pyridine) or (b) dichloro(dimethyl)silane were the cyclic spiro[7.7]titanaheptasiloxane cis-(Py)2[graphic omitted])2·2PhMe (1) and the cyclic tetrasiloxane Me2[graphic omitted] and not the expected titanadisiloxane (titanio-oxydisiloxane) and trisiloxane.