On the Accessible Reaction Channels of Vinyl Gold(I) Species: π- and σ-Pathways.
The potential of vinyl Au species to react either through a controlled π- or σ-pathway is demonstrated. This nomenclature is directly derived from the orbitals of the vinyl Au species leading to the newly formed bonds. When the π-bond of the vinyl Au intermediate is transformed into a σ-bond, we name it π-pathway, and a σ- to σ- transformation is named σ-pathway. Examples of reactions following these pathways are a Au-catalysed [3,3]-sigmatropic rearrangement and a protodeauration reaction. These reactions have been studied using intrinsic bond orbitals (IBOs) and allow for the clear identification of these pathways. Energies for the reaction path of the Au-catalysed [3,3]-sigmatropic rearrangement were in addition computed using CCSD(T)-F12. Analysis of the intrinsic reaction coordinate (IRC) of the [3,3]-sigmatropic rearrangement using IBOs further allows us to refine the previous mechanistic proposal and identifies a hidden intermediate along the reaction path.
['Nunes Dos Santos Comprido|Laura|L|', 'Klein|Johannes E M N|JEMN|http://orcid.org/0000-0002-1290-597X', 'Knizia|Gerald|G|http://orcid.org/0000-0002-7163-4823', 'Kästner|Johannes|J|http://orcid.org/0000-0001-6178-7669', 'Hashmi|A Stephen K|ASK|http://orcid.org/0000-0002-6720-8602']
protodeauration alkenes allyldeauration computational chemistry gold catalysis