Reactivity of binuclear heterobridged iridium complexes with SnCl2
- Pinillos, M.T. 1
- Elduque, A. 1
- López, J.A. 1
- Lahoz, F.J. 1
- Oro, L.A. 1
- Mann, B.E. 2
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1
Instituto de Nanociencia y Materiales de Aragón
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2
University of Sheffield
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ISSN: 1472-7773
Año de publicación: 1992
Volumen: 15
Páginas: 2389-2393
Tipo: Artículo
Otras publicaciones en: Journal of the Chemical Society, Dalton Transactions
Resumen
The complex [Ir2(μ-pz)(μ-SBut)(CO)2{P(OMe) 3}2] 1 (pz = pyrazolate) reacts with HgX2 (X = Cl or I) (1: 2 molar ratio) to give the oxidation compounds [Ir2(μ-pz)-(μ-SBut)X2(CO) 2{P(OMe)3}2] (X = Cl 2 or I 3). The addition of SnCl2 to solutions of 2 or 3 leads to the trihalogenotin iridium complexes [Ir2(μ-pz)(μ-SBut)(μ-SnCl2X) 2(CO)2{P(OMe)3}2] (X = Cl 4 or I 5]. Treating 1 with SnCl2 affords the adduct [Ir2(μ-pz)(μ-SBut)(μ-SnCl2)(CO) 2{P(OMe)3}2] 6. The formulation of the compounds has been deduced by elemental analysis, IR, 31P and 119Sn NMR spectroscopy. The structure of one isomer of 4 (4a) has been determined by X-ray diffraction methods: triclinic, space group P1, with a = 11.896(2), b = 12.863(2), c = 13.943(3) Å, α = 69.27(1), β = 68.21(1), γ = 66.47(1)°, and Z = 2. The complex is binuclear with the metal atoms bridged by a pyrazolate and a SBut ligand. The Ir-Ir distance, 2.7221(6) Å, indicates the presence of a metal-metal bond.