Reactions of Hydrogen Atoms with Hydrazine, Ammonia, and Nitrous Oxide

Reactions of hydrogen atoms with hydrazine, ammonia, and nitrous oxide have been investigated in a flow system employing a mass spectrometer for the measurements of the steady-state concentrations of the gases. It is shown that reaction with hydrazine proceeds through the mechanism: N2H4+H=H2+N2H3,k1=3.5×1011e−2000/RTmole−1cc sec−1;2N2H3=2NH3+N2,k2⩾3×1012 mole−1cc sec−1 (at 150∘C).The mechanism of the reactions of hydrogen atoms with ammonia or nitrous oxide was not elucidated but the rate of the processes H+NH3 and H+N2O can be estimated to be about 107 mole—1cc sec—1 at 150°C.