Synthesis, Characterisation and X-Ray Structure of Ferrocenyl N-Heterocyclic Carbene Complexes of Rhodium(I)

The synthesis, spectroscopic and structural characterization of Rh(I) ferrocenyl N-heterocyclic carbene complexes are described. The in situ deprotonation of the imidazolium salts with KOBu t and subsequent complexation to rhodium(I) proved to be an efficient route for their synthesis yielding good too excellent yields. The X-ray crystal structure of bromo( 4 -1,5-cyclooctadiene)(1-ferrocenyl-3-propyl-1H-imidazol-2-ylidene)rhodium(I) was obtained and reveals substitution disorder of a bromine and chlorine atom on Rh(1) in the ratio of 0.96/0.04.