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Matrix isolation study of the mechanism of the reaction of diborane with ammonia: pyrolysis of the H3B·NH3 adduct

1992; Elsevier BV; Volume: 197; Issue: 1-2 Linguagem: Inglês

10.1016/0009-2614(92)86042-g

1873-4448

John D. Carpenter, Bruce S. Ault,

Boron and Carbon Nanomaterials Research

Gas-phase pyrolysis of the H3B·NH3 adduct followed by trapping of the reaction product(s) in an argon matrix at 14 K was conducted to provide support for an earlier proposed mechanism for the reaction of B2H6 with NH3. As the pyrolysis temperature increased from 65 to 300°C, a decrease in yield of adduct was noted, along with a concomitant growth in H2BNH2. The results obtained here support a mechanism for the reaction of B2H6 with NH3 in which the 1:1 adduct H3B·NH3 is formed in an initial slow step, and is followed by rapid elimination of H2 to form H2BNH2.