METAL-COMPLEXES OF BIOLOGICALLY IMPORTANT LIGANDS - XCV - ETA(5)-PENTAMETHYLCYCLOPENTADIENYL RHODIUM, IRIDIUM, ETA(6)-BENZENE RUTHENIUM, AND PHOSPHINE PALLADIUM COMPLEXES OF PROLINE METHYLESTER AND PROLINE AMIDE

Proline methylester (L-1) and proline amide (L-2) give with the chloro bridged complexes [(eta(5)-C5Me5)MCl2](2) (M = Rh, Ir), [(eta(6)-benz ene)RuCl2](2) and [Et3PPdCl2](2) N and N,O coordinated compounds: (eta (5)-C5Me5)M(Cl-2)L-1 (1, 2 M = Rh, Ir), [(eta(5)-C5Me5)Rh(Cl)(L-2)]Cl- +(-) (5), [(eta(6)-C6Me6)Ru(Cl)(L-2)]Cl-+(-) (6), [(eta(6)-p-cymene)Ru (Cl)(L-2)]Cl-+(-) (7), [(eta(5)-C5Me5)M(Cl)(L-2-H+)] (9, 10 M=Rh, Ir), (Et3P)Pd(Cl)(2)L-1 (3), and [(Et3P)Pd(Cl)(L-2)]Cl-+(-) (8). The NMR s pectra indicate that for 5 and 6 only one diastereoisomer is formed. T he complexes 1, 2, 3 and 5 were characterized by X-ray diffraction.