Abstract
Rhodium carbene complexes of the type Rh(X)( η 4-1,5-cod)(L carbene) (X = halide anion, L carbene= imidazole, triazole, pyrazole and benzimidazole carbene) are directly accessible from [Rh( η 4-1,5-cod)Cl] 2 following a simple new one-pot synthesis. A slurry of this complex in ethanol is successively treated with an excess of both sodium ethoxide and heteroaromatic azolium salt. An in situ forted rhodium ethoxide complex acts as deprotonating agent. Cyclooctadiene may be displaced by two molecules of carbon monoxide yielding complexes of the type Rh(CO) 2X(Lincarbene), and one carbon monoxide ligand may again be replaced by phosphines or phosphites to yield trans-Rh(CO)X(L carbene)(L p). The described method also works for analogous iridium complexes. The σ-donor/π-acceptor characteristics of imidazole carbenes are compared with those of phosphines.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
