in hexane under N2, addn. of B-compd. in hexane to Li-compd. in hexane at -60°C with stirring, allowed to attain ambient temp.; insoluble material removed, hexane removed, fractional distn.;
in hexane under N2, addn. of B-compd. in hexane to Li-compd. in hexane at -60°C with stirring, allowed to warm up to room temp., kept for 30 min at reflux; solid material sepd., distd.; elem. anal.;
in hexane under N2, addn. of B-compd. in hexane to Li-compd. in hexane at -60°C with stirring, allowed to attain ambient temp.; insoluble material removed, hexane removed, fractional distn.;
