Gallylene supported by a bis(oxazolinyl)(phenyl)methanide (Boxm) ligand was synthesized and structurally characterized. The reaction of this gallylene with triphenylphosphine sulfide/selenide yielded dimeric gallium sulfide and selenide. These compounds could be converted to monomeric terminal sulfide and selenide by coordination of an external Lewis base such as an N‐heterocyclic carbene (NHC or IMe 4 ) and 4‐dimethylaminopyridiene (DMAP). These doubly‐base‐stabilized gallium sulfide/selenide reacted with phenyl isocyanate to give the corresponding cycloadducts by releasing the Lewis base, indicating the formation of a single‐base‐stabilized gallium sulfide/selenide intermediate.
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Ding et al. (2024) studied this question.
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