Palladium and rhodium complexes of a chiral pincer ligand derived from 1,3-trans disubstituted cyclohexane

Reactions of cis- and trans-1,3-bis(di-t-butylphosphinomethyl)cyclohexane (cis- and trans-PCyP), with rhodium and palladium chlorides afforded Cs and C1 symmetrical pincer complexes, RhHCl(cis-PCyP), RhHCl(trans-PCyP), [(COD)Rh(μ-Cl)2RhH(trans-PCyP)], PdCl(cis-PCyP), and PdCl(trans-PCyP), where the PCyP ligands are coordinated in a meridianal fashion through the two phosphorus atoms and the cyclometalated C-1 carbon of the cyclohexane ring. The rhodium complexes were structurally characterized by X-ray diffraction. Isomers of the RhHCl(PCyP) and PdCl(PCyP) complexes were studied by DFT calculations.

The new chiral pincer complexes of rhodium and palladium have been prepared and structurally characterized.Figure optionsDownload as PowerPoint slide