Ketenylidenetriphenylphosphorane, Ph3PC=C=O, 1, has been used to synthesize some Pt(II) η1-ketenyl derivatives, through reactions with dimeric and tetrameric chlorine-bridged compounds. Particularly it has been possible to isolate and characterize [Pt(η3-C3H5)Cl{η1-C(PPh 3)CO}], 2, and [PtCl2{η1-C(PPh3)CO}(PPh3)], 3. Moreover, the reaction of 2 with a further equivalent of 1, in the presence of AgBF4, lead to the formation of [Pt(η3-C3H5){η1-C(PPh 3)CO}2], 4, the first bis-η1-ketenyl derivative. Compound 4 is stable in solution only at low temperatures and its formation has been inferred unequivocally by IR, 1H and 31P-NMR measurements carried out at -50°C.
Reactivity of keteylidenetriphenylphosphorane (Ph3PC=C=O) with Pt(II) complexes. Evidences of formation of an up to now unknown bis-η1-ketenyl derivative / R. Bertani, F. Meneghetti, L. Pandolfo, A. Scarmagnan, L. Zanotto. - In: JOURNAL OF ORGANOMETALLIC CHEMISTRY. - ISSN 0022-328X. - 583:1-2(1999), pp. 146-151.
Reactivity of keteylidenetriphenylphosphorane (Ph3PC=C=O) with Pt(II) complexes. Evidences of formation of an up to now unknown bis-η1-ketenyl derivative
F. MeneghettiSecondo
;
1999
Abstract
Ketenylidenetriphenylphosphorane, Ph3PC=C=O, 1, has been used to synthesize some Pt(II) η1-ketenyl derivatives, through reactions with dimeric and tetrameric chlorine-bridged compounds. Particularly it has been possible to isolate and characterize [Pt(η3-C3H5)Cl{η1-C(PPh 3)CO}], 2, and [PtCl2{η1-C(PPh3)CO}(PPh3)], 3. Moreover, the reaction of 2 with a further equivalent of 1, in the presence of AgBF4, lead to the formation of [Pt(η3-C3H5){η1-C(PPh 3)CO}2], 4, the first bis-η1-ketenyl derivative. Compound 4 is stable in solution only at low temperatures and its formation has been inferred unequivocally by IR, 1H and 31P-NMR measurements carried out at -50°C.File | Dimensione | Formato | |
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