benzene in benzene Sonication; TiCl4 under Ar dissolved in benzene is immersed in an ultrasonic bath for 60 min at room temp., addn. of K(BEt3H) in benzene, for 60 min in the ultrasonic bath; filtn. of the ppt., washing (benzene), removal the solvent of the filtrate, dissolving the residue in pentane, filtn., removal the pentane, recrystn. of the residue (pentane);

in solid matrix condensation of vaporized Ti in high vac. with solid benzene matrix cooled with liq. N2;

benzene in benzene absence of air and moisture; co-condensing Ti-vapour (obtained by resistance heating of 85percent Ti - 15percent Mo alloy) with equimolar amt. of C7H8 and excess of C6H6 vapours, warming to room temp.; evacuation, extn. into hexane, crystn. (-78°C); product mixt. (cycloheptatriene:benzene complex = 1.2:1.0) not sepd., detd. by (1)H-NMR spectroscopy;

in gaseous matrix metal vaporizing (Nd(3+):YAG laser, 532 nm), C6H6 addn. (He carrier gas, room temp., partial pressure 70 Torr); not isolated, detd. by MS spectroscopy;

in neat (no solvent, gas phase) prepn. by laser evapn. of Ti atom from metal rod; evaporized atoms were cooled down by collisions with He carrier gas; C6H6 vapor mixed followedby the size and structure selection with 2-m long electrostatic hexapol e field;