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American Chemical Society, The Journal of Physical Chemistry A, 42(102), p. 8124-8130, 1998

DOI: 10.1021/jp9820929

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Product Branching Ratios of the CH + NO Reaction

Journal article published in 1998 by A. Bergeat ORCID, T. Calvo, N. Daugey, J.-C. Loison, G. Dorthe
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The multichannel CH + NO reaction was studied, at room temperature, in a low-pressure fast-flow reactor. CH was obtained from the reaction of CHBr3 with potassium atoms. The overall rate constant was found to be (1.9 ± 0.5) × 10-10 cm3 molecule-1 s-1. The relative branching ratios of NH(A3Π) + CO and NCO(A2Σ+) + H chemiluminescent pathways were determined as 42% and 58% (±7). Nascent NH(A3Π) was distributed between the vibrational levels v‘ = 1 and v‘ = 0 in the proportion of 33% and 67% (±3%). The CN chemiluminescence from the energetically allowed CN(A2Πi) + OH pathway could not be detected. Also, CN(X2Σ+) could not be detected by laser-induced fluorescence. Relative product branching ratios were determined over the channels yielding atoms probed by resonance fluorescence in the vacuum ultraviolet:  O + HCN, (72 ± 10)%; H + NCO, (21 ± 10)%; N + HCO, (7 ± 3)%.