Electrochemistry of platinum(II) coordination compounds II. Electroreduction of trimetallic dimetalliobis(isocyanide)platinum(II) complexes |
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Authors: | A Giraudeau P Lemoine M Gross P Braunstein |
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Institution: | Laboratoire d''Electrochimie et de Chimie Physique du Corps Solide, E.R.A. au C.N.R.S., No. 468, Université Louis Pasteur, 4, rue Blaise Pascal, 67000 Strasbourg France.;Laboratoire de Chimie de Coordination, E.R.A. au C.N.R.S., No. 670, Université Louis Pasteur, 4, rue Blaise Pascal, 67000 Strasbourg France. |
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Abstract: | Linear trimetallic MPPtIIL2M complexes (M = Cr(CO)3(η-C5H5), Mo(CO)3- (η-C5H5), W(CO)3(η-C5-H5), Mn(CO)5, Fe(CO)3NO, Co(CO)4; L = t-BuNC, cyclo- C0H11 NC) are reduced on platinum and gold electrodes in non-aqueous medium. All these complexes undergo irreversible one electron reductions, which result in the rupture of one Ptmetal bond and the liberation of one M? ion per mole reduced. Coupled ESR spectroscopy and coulometry show that a radical is generated during the reduction of the trimetallic complexes. The several ESR signals obtained for these paramagnetic Pt1 species exhibit no hyperfine structure.The electrochemical behaviour of MPtL2M complexes is compared with that of the following linear trimetallic complexes: MHgM and (MAuM)?. |
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