Kinetics of vibrationally hot propane produced by methylene insertion into ethane

F. B. Growcock, W. L. Hase, J. W. Simons

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The reaction of ethane with excited singlet state methylene radicals produced via the photolysis of diazo-methane at 4358 Å, yields chemically activated propane with an average energy of 119.4 ± 2.0 kcal/mol. The measured decomposition rate coefficient for the energized propane is (4.7 ± 1.2) × 108 sec-1. This rate is correlated by RRKM and absolute rate theory calculations with thermal A factors in the range 1016.7-1017.2 sec-1 and radical recombination rate coefficients in the range 2.2 × 109-5.8 × 109 l. mol-1 sec-1, which are substantially lower than estimates of experimental recombination rates for CH3 + C2H5. A dilemma of possible theoretical significance exists.

Original languageEnglish
Pages (from-to)607-614
Number of pages8
JournalJournal of physical chemistry
Volume76
Issue number4
DOIs
StatePublished - 1972

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