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


ABSTRACT: The mesomeric betaine imidazolium-1-ylphenolate forms a borane adduct with tris(pentafluorophenyl)borane by coordination with the phenolate oxygen, whereas its NHC tautomer 1-(2-phenol)imidazol-2-ylidene reacts with (triphenylphosphine)gold(I) chloride to give the cationic NHC complex [Au(NHC)2][Cl] by coordination with the carbene carbon atom. The anionic N-heterocyclic carbene 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.

SUBMITTER: Liu M 

PROVIDER: S-EPMC5238575 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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

Liu Ming M   Namyslo Jan C JC   Nieger Martin M   Polamo Mika M   Schmidt Andreas A  

Beilstein journal of organic chemistry 20161208


The mesomeric betaine imidazolium-1-ylphenolate forms a borane adduct with tris(pentafluorophenyl)borane by coordination with the phenolate oxygen, whereas its NHC tautomer 1-(2-phenol)imidazol-2-ylidene reacts with (triphenylphosphine)gold(I) chloride to give the cationic NHC complex [Au(NHC)<sub>2</sub>][Cl] by coordination with the carbene carbon atom. The anionic N-heterocyclic carbene 1-(2-phenolate)imidazol-2-ylidene gives the complexes [K][Au(NHC<sup>-</sup>)<sub>2</sub>], [Rh(NHC<sup>-</  ...[more]

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