ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The reactions of NH(X3Σ-) with NO, O2, and O have been studied in reflected and incident shock wave experiments. The source of NH in all the experiments was the thermal dissociation of isocyanic acid, HNCO. Time-histories of the NH(X3Σ) and OH(X2Π) radicals were measured behind the shock waves using cw, narrow-linewidth laser absorption at 336 nm and 307 nm, respectively. The second-order rate coefficients of the reactions: were determined to be: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{\rm 3} \, = \,1.7 \times 10^{14} \exp (- 6400/{\rm T,K)}\,\,\,\,\,\,{\rm (}f\, = \,0.65,{\rm F}\,{\rm =}\,{\rm 1}{\rm .5)}\,\,\,\,\,\,{\rm T}\,{\rm =}\,{\rm 2220 - 3350\, K,} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{\rm 4} \, = \,3.5 \times 10^{13} \exp (- 6800/{\rm T,K)}\,\,\,\,\,\,{\rm (}f\, = \,0.65,{\rm F}\,{\rm =}\,{\rm 1}{\rm .5)}\,\,\,\,\,\,{\rm T}\,{\rm =}\,{\rm 2220 - 3370\, K,} $$\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{\rm 5} \, = \,9.2 \times 10^{13} \,\,\,\,\,\,\,\,\,\,\,\,{\rm (}f\, = \,0.60,{\rm F}\,{\rm =}\,{\rm 1}{\rm .6)}\,\,\,\,\,\,{\rm T}\,{\rm =}\,{\rm 2730 - 3380\, K,} $$\end{document} cm3 mol-1 s-1, where ƒ and F define the lower and upper uncertainty limits, respectively.The branching fraction of channel defined as k3b/k3total, was determined to be 0.19 ± 0.10 over the temperature range of 2940 K to 3040 K.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550230208
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