in dichloromethane Ar-atmosphere; room temp., overnight; solvent removal (vac.), washing (pentane), drying (vac.); sublimable (80°C/0.001 Torr); elem. anal.;

in dichloromethane (inert atmosphere); addn. of the Sn complex at 0°C with stirring to TiCl4 in CH2Cl2, warming to room temp., stirring (12 h); concn., crystn. on cooling to -30°C, washing (toluene), drying (vac.); elem. anal.;

in dichloromethane to TiCl4 in CH2Cl2, indene deriv. in CH2Cl2 added dropwise at 0°C; mixt. stirred overnight at room temp.; solvent removed under vac.; to residue, hexane added; suspn. cooled to -30°C for several h; ppt. collected by filtration; washed with cold hexane; dried under vac.;

in tetrahydrofuran reacted in 1:1 molar ratio;