The rate of the chain initiation reaction, the radical decomposition of isobutane, i-C4H10→ i-C3H7+ CH3, in the pyrolysis of isobutane has been measured over a range of pressures at 824°K by determination of propane yields. A thermochemical estimate, k= 1018·4exp(–83,100/RT) sec.–1, is shown to be in close agreement and to represent an upper limit. Previously quoted values are shown to predict an excessive rate.
R. S. Konar, J. H. Purnell and C. P. Quinn, J. Chem. Soc. A, 1967, 1543 DOI: 10.1039/J19670001543
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