Knowledge Bank

The reaction products arising from the pyrolysis of mixtures of $B_{2}H_{6} $ with $NH3$ and the methylamines have been isolated and characterized in argon matrices at 14 K. For all three methylamines, the 1:1 adduct $H3B\cdot NHx(CH3)y(x+y=3)$ was isolated. The 1:1 adduct of $B_{2}H_{6} $ and $NH3$ is probably formed but undergoes rapid $H2$ elimination to give aminoborane, $H2B=NH2$. All 11 infrared active fundamentals of aminoborane were identified including the two lowest fundamentals not previously reported. In addition, the $H2$ elimination products were isolated when mono- and dimethylamine were used. $H2B=N(H)CH3$ was also isolated and characterized for the first time. The mechanism of formation of these products from the precursors will be discussed along with experiments currently in progress.