Synthesis and characterization of heterodinuclear RuPt and IrPt complexes containing pyrazolate bridging ligands.: Crystal structure of [(η<SUP>5</SUP>-C<sub>5</sub>Me<sub>5</sub>)Ir(μ-pz)<sub>3</sub>PtMe<sub>3</sub>] (pz = pyrazolate)
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Date
2000
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Abstract
The reaction of the metallo-ligand [Ru(eta(6)-p-cymene)(pz)(2)(Hpz)] with the platinum complex [{PtIMe3}(4)] affords mixtures of the heterodinuclear complexes [(eta(6)-p-cymene)Ru(mu-pz)(3)PtMe3] (1) and [(eta(6)-p-cymene)Ru(mu-pz)(2)(mu-I)PtMe3] (2). The reaction of the iridium derivative [Ir(eta(5)-C5Me5)(pz)(2)(Hpz)] with [{PtIMe3}(4)] gives [(eta(5)-C5Me5)Ir(mu-pz)(2)(mu-I)PtMe3] (3). Both [Ru(eta(6)-p-cymene)(pz)(2)(Hpz)] and [Ir(eta(5)-C5Me5)(pz)(2)(Hpz)] react with [{PtIMe3}(4)] in the presence of NaOH yielding 1 and [(eta(5)-C5Me5)Ir(eta-pz)(3)PtMe3] (4), respectively. While [Ru(eta(6)-p-cymene)(pz)(2)(Hpz)] reacts with [PtBr2Me2Sx] to give mixtures of [(eta(6)-p-cymene)Ru(mu-pz)(3)PtBrMe2] (5) and [(eta(6)-p-cymene)Ru(mu-pz)(2)(mu-Br)PtBrMe2] (6), the reaction of [Ir(eta(5)-C5Me5)(pz)(2)(Hpz)] with [PtBr2Me2Sx] gives [(eta(5)-C5Me5)Ir(mu-pz)(2)(mu-Br)PtBrMe2] (7) as the sole product. All species were characterized in solution by H-1-NMR spectroscopy. The crystal structure of complex 4 has been determined by single-crystal X-ray diffraction. (C) 2000 Elsevier Science S.A. All rights reserved.
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iridium, ruthenium, platinum, pyrazolate, heterodinuclear complexes