title: Expanding the chemistry of cationic N-heterocyclic carbenes: alternative synthesis, reactivity, and coordination chemistry.
abstract: A new synthetic route to complexes of the cationic N-heterocyclic carbene ligand 2 has been developed by the attachment of a cationic pentamethylcyclopentadienylruthenium ([RuCp*](+)) fragment to a metal-coordinated benzimidazol-2-ylidene ligand. The coordination chemistry and the steric and electronic properties of the cationic carbene were investigated in detail by experimental and theoretical methods. X-ray structures of three carbene-metal complexes were determined. The cationic ligand 2 is a poorer overall electron donor relative to the related neutral carbene, which is evident from cyclic voltammetry (CV) and IR measurements.
authors.affiliation: Institut für Anorganische Chemie und Strukturchemie, Heinrich Heine Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany.
authors.forename: Björn
authors.initials: B
authors.lastname: Hildebrandt
authors.forename: Stephan
authors.initials: S
authors.lastname: Raub
authors.forename: Walter
authors.initials: W
authors.lastname: Frank
authors.forename: Christian
authors.initials: C
authors.lastname: Ganter