Electronic, steric and catalytic properties of N-heterocyclic carbene rhodium(i) complexes linked to (metallo)porphyrins†
Abstract
Electronic and steric properties of NHC ligands functionalized with porphyrins were investigated. When porphyrins are used as NHC-wingtips, nickel(II) in the macrocyle significantly improves the catalytic activity of the neighbouring NHC-Rh(I) complex in the conjugate addition of phenylboronic acid to cyclohexen-2-one.