n-butyllithium; chloro-trimethyl-silane; ammonium chloride in tetrahydrofuran; dichloromethane; Petroleum ether Ar; nBuLi, indene, petroleum ether, -10°C; stirring, room temp.; ppt. dissolved in THF; Me3SiCl in THF added; stirring, room temp., 6 h; aq. NH4Cl added, 0°C; extd. with Et2O; evapn.; dissolved in CH2Cl2; TiCl4/CH2Cl2 added, stirring; solvent removed under vac., residue washed with petroleum ether, dried; elem. anal.;

in tetrahydrofuran soln. of TlC9H7 added slowly with stirring to soln. of TiCl4, reacted for 4 h with stirring, then refluxed for 2 h at 68°C; filtered, concd. (vac.), filtered, pptd. (petroleum ether at 40-60°C), recrystd. (CH2Cl2); elem. anal.;