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Kinetics of the pyrolysis of 1,2-diiodoethylene

✍ Scribed by Shozo Furuyama; David M. Golden; Sidney W. Benson

Publisher: John Wiley and Sons
Year: 1969
Tongue: English
Weight: 420 KB
Volume: 1
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550010203

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✦ Synopsis

The spectrophotometric determination of the rate of pyrolysis of 1,2-diiodoethylene from 305.8 to 435.0" (with additional data on the addition of iodine to acetylene from 198.1 to 331.6") has resulted in the observation of both a (in part heterogeneous) unimolecular process (A), and an iodine atom catalyzed process (B). For the homogeneous unimolecular process, log (ka/secpl) w 12.5-46/15 would appear to be reasonable, while log (k13/M-l sec-l) = 11.8-23.9/8, where 0 = 2.303RT in kcal/mole.

It is suggested that a donor-acceptor complex intermediate may explain the observed rate constant of process B and analogous reactions in other systems.

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