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Formation of H and D atoms in pyrolysis of 1,3-butadiene and 1,3 butadiene-1,1,4,4,-d4 behind shock waves

✍ Scribed by V. S. Rao; Kunio Takeda; Gordon B. Skinner

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 606 KB
Volume: 20
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550200208

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✦ Synopsis

Highly dilute mixtures of 1,3-butadiene and 1,3-butadiene-1,1,4,4-d4 were pyrolyzed behind reflected and incident shock waves, respectively. Concentrations of H and D atoms were measured by resonance absorption spectroscopy. In the early stages of the reaction, nearly equal amounts of H and D were formed from CD,CHCHCD,, indicating that loss of H from C, followed by loss of D from C, is a more important reaction than breaking of the central C -C bond. Overall, rate constants for atom-forming reactions are much slower than rate constants for disappearance of butadiene in earlier experiments, suggesting that most of the butadiene disappears by processes that do not involve H or D atoms or by radicals that produce them rapidly.

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