n-butyllithium in diethyl ether; hexane addn. of BuLi in n-hexane to C5H(CH3)5 at -78°C, warming up to room temp. with stirring, pptn, filtration, washing with n-pentane, addn. of diethyl ether, cooling to -78°C, addn. of BeCl2 in diethyl ether and stirring for 3 h at room temp.; evapn., dissolving in n-hexane, cooling to room temp., removing the liquor after 48 h, sblimation, elem. anal.;

in diethyl ether; toluene Mg(C5Me5)2 in toluene was added to BeCl2(OEt2)2 in Et2O, the mixt. was refluxed for 12 h then cooled to room temp.;; evapd., extd. with pentane, filtered, concd., cooled to -10°C; sublimation; elem. anal.;;

in diethyl ether crystd. from pentane or by sublimation at 30-40°C/0.01 mmHg;;

1: diethyl ether 2: toluene 3: benzene-d6 View Scheme

in perdeuterocyclohexane equilibrium reaction; monitored by (1)H-NMR;