FeCl3 in tetrahydrofuran under Ar, in flask with Mg chips added anhyd. FeCl3, cycloheptatriene, THF, and, over 3-h period to allow warming stirred mixt., soln. of Ti complex in THF, mixt. stirred at room temp. for 12 h; volatile products evapd. under vac., residue sublimed at 130°C (E-2 mmHg), solid washed with hexane, dried under vac.;

in dichloromethane T=20°C; DarknessInert atmosphere;