Reversible protonation of isobutane in liquid superacids in competition with protolytic ionization

J Sommer, J Bukala, M Hachoumy…

Index: Sommer, Jean; Bukala, Jozef; Hachoumy, Mohammed; Jost, Roland Journal of the American Chemical Society, 1997 , vol. 119, # 14 p. 3274 - 3279

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Citation Number: 50

Abstract

The deuterium distribution observed in isobutane recovered after short contact times with the DF-SbF5 superacid at 0° C shows that a very fast reversible protonation of all CH bonds occurs before ionization of the alkane, in accord with the Olah σ-basicity concept. Comparison of the amounts of hydrogen with the amount of tert-butyl ions generated during ionization shows that the reaction is purely protolytic in HF containing up to 20 mol% SbF5 ...

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