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Abstract | Cited by

Through a redox-transmetallation procedure, divalent NHC–LnII (NHC = N-heterocyclic carbene; Ln = Eu, Yb) complexes were obtained from the corresponding NHC–AgI. The lability of the NHC–LnII bond was investigated and treatment with CO2 led to insertion reactions without oxidation of the metal centre. The EuII complex [EuI2(IMes)(THF)3] (IMes = 1,3-dimesitylimidazol-2-ylidene) exhibits photoluminescence with a quantum yield reaching 53%.

Graphical abstract: Access to divalent lanthanide NHC complexes by redox-transmetallation from silver and CO2 insertion reactions

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