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The reactions of atomic hydrogen and active nitrogen with hydrogen azide

✍ Scribed by G. Le Bras; J. Combourieu

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
790 KB
Volume
5
Category
Article
ISSN
0538-8066

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✦ Synopsis

Detection of atoms by mass spectrometry has been used to study the reactions of hydrogen azide, HN3, with H atoms and active nitrogen, in a fast flow reactor at pressures of about 1 torr. Stoichiometry and products of the H + HN3 reaction have been determined and the rate constant of the initial step, assumed to be H + HN3 -NH2 + N2, was found to be 2.54 X lo-" exp (-4600/RT) cm3 molecule-' s-l, in the temperature range of 3OQ-460 K. The formation of NHI and H2 products has been discussed from the different secondary steps which may occur in the mechanism. For the reaction of active nitrogen with HN,, evidence has been found for the participation of excited nitrogen molecules produced by a microwave discharge through molecular nitrogen. The influence of excited nitrogen molecules has been reduced by lowering the gas flow velocity. It was then possible to study the N + HN3 reaction for which the rate constant of the initial step was found to be 4.9 X Finally, the occurrencac of these elementary reactions has been discussed in the mechanism of the decomposition flame of HN3.

cm3 molecule-' s-' at room temperature.

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