in diethyl ether C5H4(CH3)Li slurry added slowly to TiCl4 soln. under Ar at 0°C, stirred for 30 min; evapd. (vac.), washed with aq. HCl, with EtOH, with ether, recrystd. (toluene), recrystd. (CHCl3);

in tetrahydrofuran byproducts: TlCl; addn. of Ti complex soln. (recrystn. from CH2Cl2; drying in vac.) to TlCp suspension, -78°C; heating to room temp. within 12h; refluxing, 2h; filtration from TlCl; evapn. to dryness; hot extn. (benzene, 8h); evapn.; recrystn. (CH2Cl2); elem. anal.;

in diethyl ether methylcyclopentadienyllithium suspn. added dropwise to stirred complex soln. at 0°C under Ar, allowed to warm to room temp., stirred for30 min; concd. (vac.), aq. HCl added, solids filtered, washed with aq. HCl, with cold ether, dried, fractionally crystd. (hot toluene);

in tetrahydrofuran molar ratio 1:1 (from Samuel, E.: J. organometal. Chem., 1969, 19, 87);

in toluene Al(CH3)3 soln. added to (C5H4(CH3))(C5H5)TiCl2 (Ar) contg. impurity of (C5H5)2TiCl2, stirred for 40 h at room temp., solvent and Al(CH3)2Cl removed (vac.), dissolved in toluene, Al(CH3)3 soln. added, stirred for 12 h; solvent removed (vac.), , extd. (hexane), concd., cooled to -50°C, powder washed with hexane, dried (vac.);