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

Full Text: HTML

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 ...

Related Articles:

Elimination of molecular hydrogen and methane from collision-activated alkoxide negative ions in the gas phase. An ab initio and isotope effect study

[Hayes, Roger N.; Sheldon, John C.; Bowie, John H.; Lewis, David E. Australian Journal of Chemistry, 1985 , vol. 38, # 8 p. 1197 - 1208]

A stepwise mechanism for gas-phase unimolecular ion decompositions. Isotope effects in the fragmentation of tert-butoxide anion

[Tumas, William; Foster, Robert F.; Pellerite, Mark J.; Brauman, John I. Journal of the American Chemical Society, 1987 , vol. 109, # 4 p. 961 - 970]

More Articles...