Imidazole complexes of manganese(I) are transformed into their corresponding N-heterocyclic carbene derivatives by means of acid−base treatments; the subsequent sequential transmetalation reaction of the carbene to gold(I) proceeds through isolable heterometallic intermediate species.
Fused in the same molecule! An N-heterocyclic carbene and a diphosphine are generated and used in the modular synthesis of a variety of target heterometallic complexes. The experimental approach involves formation of a unique 4,5-bis(diphenylphosphino)-1,3-dimethyl-imidazolium salt, simply by starting from 1-methylimidazole (see scheme; M(1) = Cr, Mn; M(2) = Au, Rh, Pd; LiHMDS = LiN(SiMe(3))(2)).
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