REACTIONS OF ALUMINUM BOROHYDRIDE
EASTERN NAZARENE COLL WOLLASTON MASS
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KINETICS OF THE EXCHANGE REACTION OF ALBH43 WITH D2 Preliminary studies indicated a drift in exchange rates as calculated by the exchange law, especially for those runs where the ratio of D2 to AlBH43 pressure was large. The assumption was made that the drift was due to the contribution of 2 different mechanisms proceeding at different rates. DEUTERIUM EXCHANGE BETWEEN B2D6 and ALBH43 The kinetics of the exchange were studied from -70 to 20 C. The orders of reaction were dependent on the relative proportions of B2D6 and AlBH43. A mechanism was proposed involving the thermal dissociation of both AlBH43 and B2D6 followed by a rate determining collision of B2D6 with borane radicals. Evidence was obtained proving that the B atoms undergo exchange in this reaction by the use of B-10-enriched B2D6. THE REACTION OF ALBH43 WITH NH3 The AlBH43-NH3 reaction product was obtained as a uniform white amorphous appearing powder which dissolved in cold water with slow gas evolution. The solid was ignited with a laboratory burner flame and burned smoothly with a green flame. IR spectroscopy indicated that some B-H bonds remain intact in the ammoniated AlBH43.