Barriers to pyramidal inversion at phosphorus in phospholes, phosphindoles, and dibenzophospholes

W Egan, R Tang, G Zon, K Mislow

Index: Egan,W. et al. Journal of the American Chemical Society, 1971 , vol. 93, p. 6205 - 6216

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Citation Number: 144

Abstract

Abstract: Pyramidal inversion barriers (AG*) of variously substituted phospholes, a phosphindole, and a dibenzophosphole have been measured and compared with the inversion barriers of model compounds. It has been found that alkyl or aryl substituents do not significantly influence the unusually low barrier to pyramidal inversion (ca. 15-16 kcal/mol) at phosphorus in the phosphole system, but that mono-and diannulation (with a ...