Kinetic and mechanistic studies of the gas-phase thermolysis of hexaborane(12), and of its cothermolysis with other binary boranes and with CO, BH₃·CO and H₂

Gas-Phase Reaction of Tetraborane(10) and Ethyne: Molecular Structure of nido-1,2-C2B3H7 in the Gas Phase

“…Secondly, B 2 H 6 is not produced at any significant rate in the initial stages of the thermolysis of B 4 H 10 at 40 °C; it does appear eventually but is probably formed by decomposition of the B 5 H 11 produced in the reaction. In contrast, B 5 H 11 55 and B 6 H 12 , both of which are thought to decompose mainly via elimination of {BH 3 }, each generate B 2 H 6 from the outset in their thermolysis reactions, at the rate of 0.5 mol per mole of borane. This is consistent with rapid recombination of the {BH 3 } moieties released in these two decompositions.…”

“…Young [Scientific Glassware] Ltd.). Mass spectrometric techniques developed in our earlier studies of binary borane interconversion reactions 21 were used to monitor the gas-phase reactions and to determine the optimum stage at which to quench the products, but no attempt was made to develop a rigorous quantitative analytical technique for the analytically more complex carborane system. The 1-liter Pyrex bulb used for the monitored reactions was enclosed in an isothermal oven and attached Via Veridia capillary tubing (180 mm, 0.1 mm internal diameter) to a Kratos MS30 mass spectrometer.…”