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- W2023340280 abstract "Rupe and Meyer−Schuster rearrangements for the R2C(OH)C⋮CH + H3O+ and (H2O)9 model (R = methyl and phenyl groups) have been investigated by the use of density functional theory calculations. In the substrate R2C(OH)C⋮CH catalyzed by H3O+(H2O), three reaction channels, the two rearrangements and SN (nucleophilic substitution), were predicted by the frontier molecular orbital theory. The SN (the OH-group exchange) path was found to have a large activation energy. For 2-methylbut-3-yn-2-ol (R = Me), the Rupe rearrangement has been found to be much more favorable than the Meyer−Schuster rearrangement. For 1,1-diphenylprop-2-yn-1-ol (R = Ph), the occurrence of Meyer−Schuster rearrangement is very likely with the small activation energy. Both rearrangements do not involve the carbonium ion intermediates. However, the calculated geometries of the first transition state are carbonium-ion-like. Dehydration and hydration may occur via the intermolecular proton relay along the hydrogen-bond chains. Minimal models were proposed to represent reaction mechanisms of both rearrangements." @default.
- W2023340280 created "2016-06-24" @default.
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- W2023340280 date "2006-07-22" @default.
- W2023340280 modified "2023-10-03" @default.
- W2023340280 title "Active Role of Hydrogen Bonds in Rupe and Meyer−Schuster Rearrangements" @default.
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- W2023340280 doi "https://doi.org/10.1021/ct600132k" @default.
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