Secondary hydrogen isotope effect in the unimolecular decomposition of 2-methylpropane radical cations

…, KF Donchi, JC Traeger, JR Christie…

Index: Mead, Phillip T.; Donchi, Kevin F.; Traeger, John C.; Christie, John R.; Derrick, Peter J. Journal of the American Chemical Society, 1980 , vol. 102, # 10 p. 3364 - 3369

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Citation Number: 18

Abstract

Abstract: The intensities of the mass spectral metastable peaks for loss of methane from 2- methylprOpane-ll 1.3, 3, 3-d6 reveal a strong secondary hydrogen isotope effect, in that the rate of loss of CH3D is approximately an order of magnitude greater than the rate of 109s of CD, H, which in turn is several times greater than the rate of loss of CD4. This isotope effect is interpreted in terms of a nonclassical transition state involving a three-center bond. This ...