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Hidden silylium-type reactivity of a siloxane-based phosphonium–hydroborate ion pair

Fontana, Nicolò ; Espinosa-Jalapa, Noel Angel ; Seidl, Michael ; Bauer, Jonathan O.


A new class of siloxane-based cations with hidden silylium-type reactivity is provided, which, in combination with an arylborate counteranion, initiates a highly selective para-C(sp(2))-F defunctionalization of a perfluorinated aryl group. The hydrodefluorinated aryl borane is obtained as a crystalline solid via continuous sublimation during the reaction. The heterocyclic six-membered cation ...


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