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Issue 6, 1981
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The ring-opening reactions of cyclobutylmethyl and cyclobutenylmethyl radicals

Abstract

Rate constants for the ring-opening reactions of cyclobutylmethyl, 1-cyclobutyl-1-methylethyl, and cyclobut-2-enylmethyl radicals have been determined over a range of temperatures by kinetic e.p.r. spectroscopy. The results can be represented by equations (i)–(iii), respectively. The results are compared with those for ring, log (k3/s–1)=(13.1 ± 1.4)-(49.8 ± 7.5 kJ mol–1)/2.3RT(i) log (k5/s–1)=(13.6 ± 1.6)-(58.1 ± 9.0 kJ mol–1)/2.3RT(ii) log (k10/s–1)=(12.2 ± 1.4)-(42.2 ± 8.0 kJ mol–1)/2.3RT(iii) opening of other cycloalkylmethyl radicals. The rate constants for self-reaction of n-pentyl radicals in toluene solution have also been measured over a temperature range and found to fit relation (iv). log (2kt/dm3 mol–1 s–1)=(12.3 ± 0.7)-(10.5 ± 3.0 kJ mol–1)/2.3RT(iv)

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Article type: Paper
DOI: 10.1039/P29810000970
Citation: J. Chem. Soc., Perkin Trans. 2, 1981,0, 970-974

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    The ring-opening reactions of cyclobutylmethyl and cyclobutenylmethyl radicals

    K. U. Ingold, B. Maillard and J. C. Walton, J. Chem. Soc., Perkin Trans. 2, 1981, 0, 970
    DOI: 10.1039/P29810000970

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