| Autor: |
Albinati, Alberto, Bracher, Gustav, Carmona, Daniel, Jans, Josef H.P., Klooster, Wim T., Koetzle, Thomas F., Macchioni, Alceo, Ricci, John S., Thouvenot, René, Venanzi, Luigi M. |
| Zdroj: |
Inorganica Chimica Acta; November 1997, Vol. 265 Issue: 1-2 p255-265, 11p |
| Abstrakt: |
The complexes [(PEt3)2(Ar)Pt(μ-H)PtH(PEt3)2][BPh4] (Ar=Ph,2,4-Me2C6H3, 2,4,6-Me3C6H22) were prepared and characterized. Multinuclear, multidimensional NMR studies of these complexes show that, in solution, (i) they exist in rapidly intercoverting conformers which retainn the bent Pt(μ-H)PtH moieties found in the solid state, (ii) the coordination at each platinum atom is square planar, (iii) the two coordination planes are perpendicular to each other and (iv) the aryl group is perpendicular to the coordination plane of the platinum atom to which it is bonded. The complex [PEt3)2Pt(μ-H)PtH(PEt3)2][BPh4] does not react with C2H4and CH2:CH·CO2Me. At −60°C or above, [(PEt3)2(Ph)Pt(μ-H)PtH(PEt3)2)][BPh4] reacts with CO giving the platinum(II) cations trans-[PtX(CO)(PEt3)2](Ph)∗(X=H and Ph), and [PtH(PEt3)3]+and the platinum(0) carbonyl cluster [Pt4(μ-CO)3)4]. The cluster structure of I(PEt3)2(Ph)·Pt(μ-H)PtH(PEt3)2][BPh4, obtained by neutron diffraction, shows that the Pt-H-Pt bond angle in this cation is 125(1)° indicating that the interaction between these three atoms is weak. |
| Databáze: |
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