Olefin uptake as tool for linking platinum(II) and iridium(III) in heterobinuclear complexes: Synthesis and characterization of [PtI2(Me2phen){(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)}]

The ability of [PtX2(Me2phen)] (Me2phen = 2,9-dimethyl-1,10-phenanthroline, X = Cl, Br, I) to act as olefin scavengers, easily giving stable trigonal bipyramidal five-coordinated platinum species [PtX2(Me2phen)(η2-olefin)], has been checked toward [(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)], a cyclopentadienyl complex containing an olefinic function introduced by ring methyl activation in the pentamethylcyclopentadienyl iridium(III) complex [(C5Me5)Ir(Me)(CO)(Ph)]. The reaction of [PtI2(Me2phen)] with [(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)] results in the formation of the heterometallic binuclear complex [PtI2(Me2phen){(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)}] which is stable and has been completely characterized by elemental analysis, 1H, 13C, and 195Pt NMR spectroscopy.

The ability of [PtX2(Me2phen)] (X = Cl, Br or I) complexes to give olefin uptake leading to five-coordinated platinum(II) species [PtX2(Me2phen)(η2-olefin)], can be used for the preparation of binuclear heterometallic compounds provided that olefinic function is covalently bound to another metal complex and available for coordination to platinum. [PtI2(Me2phen)] reacts with [(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)], a cyclopentadienyl complex containing an olefinic function introduced by ring methyl activation in the pentamethylcyclopentadienyl iridium(III) complex [(C5Me5)Ir(Me)(CO)(Ph)], to give [PtI2(Me2phen){(C5Me4CH2CH2CHCH2)Ir(Me)(CO)(Ph)}]. The Pt–Ir heterometallic binuclear complex is air and solution stable and has been completely characterized by elemental analysis, 1H, 13C and 195Pt NMR spectroscopy.Figure optionsDownload as PowerPoint slide