title: Cyclic Amino(Ylide) Silylene: A Stable Heterocyclic Silylene with Strongly Electron-Donating Character.
abstract: An isolable heterocyclic silylene (4) with two different π-donating substituents, namely a classical amino group and a more electropositive and stronger carbon-based π-donating phosphonium ylide, was synthesized and fully characterized. The combination of these two different π-donating substituents confers high thermal stability and an unusual nucleophilic character on silylene 4. Therefore, silylene 4 behaves as a strong donor ligand toward transition metals with a donating character comparable to N-heterocyclic carbenes, in contrast to classical N-heterocyclic silylenes, which generally present a weak donating character.
authors.affiliation: Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 118 route de Narbonne, 31062, Toulouse cedex 9, France.
authors.forename: Isabel
authors.initials: I
authors.lastname: Alvarado-Beltran
authors.affiliation: Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 118 route de Narbonne, 31062, Toulouse cedex 9, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Baceiredo
authors.affiliation: Université de Toulouse, UPS, ICT-FR2599, 118 route de Narbonne, 31062, Toulouse cedex 9, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Saffon-Merceron
authors.affiliation: Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
authors.forename: Vicenç
authors.initials: V
authors.lastname: Branchadell
authors.affiliation: Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 118 route de Narbonne, 31062, Toulouse cedex 9, France.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kato
keywords: heterocycles; ligand design; ligand effects; main-group chemistry; silylenes