Para-hydrogen-induced polarization in rhodium complex-catalyzed hydrogenation reactions

Article abstract of DOI:10.1016/0022-328X(89)85265-9

The homogeneous hydrogenation of PhCCH catalyzed by RhClL3, Rh(COD)L2⁺, and Rh(COD)dppe⁺ (L=PPh3; COD=1,5-cyclooctadiene; dppe=1,2-bis(diphenylphosphino)ethane) has been investigated using para-hydrogen-induced polarization (PHIP) which shows that in accord with earlier studies, for RhClL3 the addition of H2 is reversible, whereas for Rh(COD)(dppe)⁺ and Rh(COD)L2⁺, H2 addition in hydrogenation catalysis is irreversible.