in pentane (under Ar) to a soln. of Ti(CH2Ph)4 in pentane is slowly added a soln. of n-BuLi in pentane at -30°C with stirring (1 h), the mixt. is then stirred for 2 h and warmed to room temp.; ppt. is filtered, washed with toluene and pentane (at -78°C), warmed to room temp. and dried in vac., elem. anal.;