in tetrahydrofuran soln. of Ti complex in THF reacted with neat Ph2CN2 under N2, heated until all ppt. dissolved; (CpTiCl)2(NNCPh2)2 crystd. from resulting soln., filtered soln. evapd., residue collected with toluene and heated, suspn. filtered when hot, added hexane, CpTiCl3 crystd. from this soln.;