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Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Rearrangements involving the phenonium ion: a theoretical investigation
E del Río1, M I Menéndez, R López
1Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, C/Julián Clavería, 8, 33006 Oviedo, Principado de Asturias, Spain.
Abstract:
Rearrangements involving the phenonium ion were investigated by means of a B3LYP/6-311G(d,p) study in which the effect of solvent has been incorporated by using a PCM solvation model. A rationalization of the whole set of experimental facts reported both in the gas phase and in solution was possible thanks to the characterization of protonated benzocyclobutene as a minimum energy structure and, particularly, to the important preferential stabilization in solution of the TS for the isomerization of the phenonium ion to the alpha-methylbenzyl ion, which reduces the Gibbs energy barrier of 26.6 kcal/mol for this process in the gas phase to a more accessible one of 18.7 kcal/mol in solution.
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