ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Mixtures of cyanogen and nitrous oxide diluted in argon were shock-heated to measure the rate constants of A broad-band mercury lamp was used to measure CN in absorption at 388 nm [B2Σ+(v = 0) ← X2Σ+(v = 0)], and the spectral coincidence of a CO infrared absorption line [v(2 ← 1), J(37 ← 38)] with a CO laser line [v(6 → 5), J(15 → 16)] was exploited to monitor CO in absorption. The CO measurement established that reaction (3) produces CO in excited vibrational states. A computer fit of the experiments near 2000 K led to \documentclass{article}\pagestyle{empty}\begin{document}$$ k_2 \, = \,10^{11.70\left( { + 0.25, - 0.19} \right)} \,{{{\rm cm}^3 } \mathord{\left/ {\vphantom {{{\rm cm}^3 } {{\rm mol}}}} \right. \kern-\nulldelimiterspace} {{\rm mol}}}\, \cdot \,{\rm s} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ k_3 \, = \,10^{13.26 \pm 0.26} \,{{{\rm cm}^3 } \mathord{\left/ {\vphantom {{{\rm cm}^3 } {{\rm mol}}}} \right. \kern-\nulldelimiterspace} {{\rm mol}}}\, \cdot \,{\rm s} $$\end{document} An additional measurement of NO via infrared absorption led to an estimate of the ratio k5/k6: with k5/k6 ≃ 103.36±0.27 at 2150 K. Mixtures of cyanogen and oxygen diluted in argon were shock heated to measure the rate constant of and the ratio k5/k6 by monitoring CN in absorption. We found near 2400 K: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_4 \, = \,10^{12.68\left( { + 0.27, - 0.19} \right)} \,{{{\rm cm}^3 } \mathord{\left/ {\vphantom {{{\rm cm}^3 } {{\rm mol}}}} \right. \kern-\nulldelimiterspace} {{\rm mol}}}\, \cdot \,{\rm s} $$\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$$ {{k_5 } \mathord{\left/ {\vphantom {{k_5 } {k_6 }}} \right. \kern-\nulldelimiterspace} {k_6 }}\, = \,10^{2.68 \pm 0.28} $$\end{document} The combined measurements of k5/k6 lead to k5/k6 ≃ 10-3.07 exp(+31,800/T) (±60%) for 2150 ≤ T ≤ 2400 K.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550160306
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