title: 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.
authors.affiliation: Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany.
authors.forename: Ming
authors.initials: M
authors.lastname: Liu
authors.affiliation: Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany.
authors.forename: Jan C
authors.initials: JC
authors.lastname: Namyslo
authors.affiliation: University of Helsinki, Department of Chemistry, P.O. Box 55, FIN-00014 Helsinki, Finland.
authors.forename: Martin
authors.initials: M
authors.lastname: Nieger
authors.affiliation: University of Helsinki, Department of Chemistry, P.O. Box 55, FIN-00014 Helsinki, Finland.
authors.forename: Mika
authors.initials: M
authors.lastname: Polamo
authors.affiliation: Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Schmidt
keywords: anionic ligand; carbene tautomer; imidazol-2-ylidene; mesoionic compound; mesomeric betaine