The efficiency (kobs/kcoll) of the gas phase hydride ion transfer from 2,2-dimethylbutane to tert-butyl cation displays a pronounced positive pressure dependence, which suggests significant anchimeric assistance of the methyl groups of 2,2-dimethylbutane adjacent to the departing CH2 hydride in the transition state.
M. E. Crestoni, S. Fornarini, M. Lentini and M. Speranza, J. Chem. Soc., Chem. Commun., 1995, 121 DOI: 10.1039/C39950000121
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