Abstract
The ultra-violet, infra-red and mass spectra of gaseous NCl3, N3Cl and N3Br are reported. The use of an ultra-violet absorption spectrophotometric system for the measurement of small optical densities in a low-pressure discharge-flow apparatus is described. The radicals NCl2(from the reaction Cl + NCl3) and N3(from the reaction Cl + N3Cl) were detected by means of their ultra-violet absorption spectra, using this system. The rate of removal of NCl2 radicals at 298 K and from 1–3 torr total pressure was second-order in [NCl2] and independent of total pressure, and a mean value for the second-order rate constant, k2=(5.5 ± 0.4)× 1011 cm3 mol–1 s–1, was found under these conditions.
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