Intermediate formed when warming condensated react. mixt. from temp. <=-100 °C to m.p. It reacts with excess BF3 into a solid phase and a B2H6-HBF2-BF3 gas mixt. when heated to room temp.;
in neat (no solvent) addn. of C5H5N to a 10.45percent soln. of HB(OCH3)2 in B(OCH3)3 at -7°C, warming to room temp., stirring for 24h;; filtration, removal of B(OCH3)3 by vac. distn.;;
