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(A2Π
i
) + 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)%.
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