SYNTHESIS, CHARACTERIZATION, AND REACTION CHEMISTRY OF THE NOVEL HETEROBIMETALLIC IRIDIUM PLATINUM COMPLEXES [(PR3)2(CO)IR(MU-H)(MU-ETA-2-ETA-1-CH=CH2)PT(PR'3)2]+[OTF]-

Reactions of Ir(I)-triflate complexes trans-Ir(OTf)(CO)(PR3)2 (PR3 = PPh3, 1; PR3 = PMePh2, 2) with Pt0-pi-ethylene complexes Pt(H2C = CH2)(PR'3)2 (PR'3 = PPh3, 3; (PR'3)2 = Ph2P(CH2)3PPh2, 4) in CH3NO2 result in C-H bond activation and the ready formation of the novel heterobimetallic Ir-Pt complexes [(PR3)2(CO)Ir(mu-H)(mu-eta(2):eta(1)-CH = CH2)Pt(PR'3)2]+[OTf]- (PR3 = PR'3 = PPh3, 5; PR3 = PMePh2, PR'3 = PPh3, 6; PR3 = PPh3, (PR'3)2 = Ph2P(CH2)3PPh2, 7; PR3 = PMePh2, (PR'3)2 = Ph2P(CH2)3PPh2, 8). A definitive structural determination for these heterobimetallic Ir-Pt complexes has been established by an X-ray diffraction study on complex 5 (triclinic, P1BAR (No.2), a = 13.321 (1) angstrom, b = 15.461 (2) angstrom, c = 17.753 (2) angstrom, alpha = 90.37 (1)-degrees, beta = 95.47 (1)-degrees, gamma = 100.92 (1)-degrees, Z = 2). Reactivity tests with one of the heterobimetallic complexes 7, using Ph2P(CH2)3PPh2 and acids, have also been conducted.