Reaction Kinetics and Catalysis Letters, Vol.70, No.2, 293-301, 2000
Homogeneous catalysis of the water gas shift reaction by bridged dinuclear pyrazolate rhodium complexes. FT-IR, H-1 and C-13 NMR in situ studies
Homogeneous catalysts for the water gas shift reaction prepared from Rh-2(mu -Pz)(2)(COD)(2) (Pz = pyrazolate ion and COD = 1,5-cyclooctadiene) in aqueous organic solvent media (pyridine, 4-picoline or 2-ethoxyethanol) and Rh-2(mu -Pz)(2)(CO)(2)(TPPMS)(2) (TPPMS meta-sulfonatophenyl-diphenyldiphosphine in acidic aqueous media under mild conditions are described. bz situ FT-IR, H-1 and C-13 NMR spectroscopic studies of the Rh-2(mu -Pz)(2)(COD)(2) catalytic system reveal the presence of hydrido-Rh complexes with linear and bridging carbonyls. These complexes also catalyze the reduction of nitrobenzene to aniline.