From betaines to anionic N-heterocyclic carbenes : Borane, gold, rhodium, and nickel complexes starting from an imidazoliumphenolate and its carbene tautomer

Liu, Ming; Namyslo, Jan C. GND; Nieger, Martin; Polamo, Mika; Schmidt, Andreas GND

The mesomeric betaine imidazolium-1-ylphenolate forms a borane adduct with tris(pentafluorophenyl)borane by coordination withthe phenolate oxygen, whereas its NHC tautomer 1-(2-phenol)imidazol-2-ylidene reacts with (triphenylphosphine)gold(I) chlorideto give the cationic NHC complex [Au(NHC)2][Cl] by coordination with the carbene carbon atom. The anionic N-heterocycliccarbene 1-(2-phenolate)imidazol-2-ylidene gives the complexes [K][Au(NHC−)2], [Rh(NHC−)3] and [Ni(NHC−)2], respectively.Results of four single crystal analyses are presented.

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Liu, Ming / Namyslo, Jan / Nieger, Martin / et al: From betaines to anionic N-heterocyclic carbenes. Borane, gold, rhodium, and nickel complexes starting from an imidazoliumphenolate and its carbene tautomer. 2016.

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