in neat (no solvent) byproducts: H2; BF3, CH3CCH condensed at -196°C to a flask with N(CH3)4B3H8, mixt. warmed to -20°C (CCl4-liquid N2 slush) for 3 h with stirring, cooled to -196°C; products subjected to cold-column fractionation; detd. by mass spectroscopy;
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.;
