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An FTIR spectroscopic study of the reactions Br + CH3CHO → HBr + CH3CO and CH3C(O)OO + NO2 ⇌ CH3C(O)OONO2 (PAN)

✍ Scribed by H. Niki; P. D. Maker; C. M. Savage; L. P. Breitenbach

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
458 KB
Volume
17
Category
Article
ISSN
0538-8066

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✦ Synopsis

Based on a n FTIR-product study of the photolysis of mixtures containing Br,-CH3CH0 and Br,-CH3CHO-HCHO in 700 torr of N,, the rate constant for the reaction Br + CHBCHO + HBr + CH3C0 was determined to be 3.7 x lo-', cm3 molecule-' sf'. In addition, the selective photochemical generation of Br at A > 400 nm in mixtures containing Br2-CH3CHO-'4N02 (or '5N02)-02 was shown to serve as a quantitative preparation method for the corresponding nitrogen-isotope labeled CH3C(0)OON0, (PAN). From the dark-decay rates of "N-labeled PAN in large excess 14N02, the rate constant for the unimolecular reaction CH3C(0)00'5N02 + CH3C(0)O0 + 15N02 was measured to be 3.3 (t0.2) x s-l at 297 t 0.5 K.

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