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Thermal reactions of ethane-d6–acetylene and D2–acetylene mixtures behind shock waves

✍ Scribed by David Rogers; Gordon B. Skinner

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
501 KB
Volume
13
Category
Article
ISSN
0538-8066

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✦ Synopsis

A study of the thermal decomposition of an acetylene-ethane-d6 mixture indicates that the rate constant for hydrogen abstraction from acetylene by methyl is more than 20 times less than for abstraction from ethane. Isotopic exchange is initiated by a rapid reaction between product D atoms and C2H2. A series of experiments involving the reactions of a D2acetylene mixture indicated that a molecular exchange process was also occurring, and it was shown that d[CpHD]/dt = k[D2]0.7[C2H2]0.3, effective activation energy = 15.8 kcalhol. This mechanism made an insignificant contribution to isotope exchange in C ~H T C ~D ~ mixtures.

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