Product branching ratios of the CH+NO reaction

被引：38

作者：

Bergeat, A ^{[1
]}

Calvo, T ^{[1
]}

Daugey, N ^{[1
]}

Loison, JC ^{[1
]}

Dorthe, G ^{[1
]}

机构：

[1] Univ Bordeaux 1, Lab Physicochim Mol, CNRS, UMR 5803, F-33405 Talence, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1998年 / 102卷 / 42期

关键词：

D O I：

10.1021/jp9820929

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The multichannel CH + NO reaction was studied, at room temperature, in a low-pressure fast-flow reactor. CH was obtained from the reaction of CHBr(3) with potassium atoms. The overall rate constant was found to be (1.9 +/- 0.5) x 10(-10) cm(3) molecule(-1) s(-1). The relative branching ratios of NH(A(3)Pi) + CO and NCO-(A(2)Sigma(+)) + H chemiluminescent pathways were determined as 42% and 58% (+/- 7). Nascent NH(A3 Pi) 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(A(2)Pi(i)) + OH pathway could not be detected. Also, CN(X(2)Sigma(+)) 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)%.

引用

页码：8124 / 8130

页数：7

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