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Free keywords:
Hyperconjugation; Anitaromaticity
Abstract:
The electronic structure and heats of formation of several acyloxy cations and the isomeric dioxacyclopropyl cations have been determined by MINDO/2 calculations. The potential energy surface shows the cyclic isomer to represent the least energy species. The stabilizing effect of alkyl substituents in the latter has been traced to strong hyperconjugative interaction.