Formation of novel chelating phosphine ligands via the reaction of [WCC6H4Me-4(CO)2(η-C5H5)] with the bidentate phosphine C6H4(PH2)2-1,2; X-ray crystal structures of the complexes [W{σ,η3-C6H4(PH2)(PC{OH}CH{C6H4Me-4})-1,2}(CO)(η-C5H5)], [{Wl{C6H4(PH2)(P{Me}C{O}CH2{C6H4Me-4})-1,2}(CO)(η-C5H5)·(]1/2C4H8O), and [WCo3(µ3-CR){µ-C6H4(PH2)(PC{OH}CH{C6H4Me-4})-1,2}(CO)9(η-C5H5)](R = H or Me)

Abstract

Treatment of the mononuclear alkylidyne complex [WCC₆H₄Me-4(CO)₂(η-C₅H₅)] with one equivalent of the bidentate phosphine C₆H₄(PH₂)2–1,2 affords the metalla-phosphine complex [W{σ,η³-C₆H₄(PH₂)(PC{OH}CH{C₆H₄Me-4})-1,2}(CO)(η-C₅H₅)] which has an unused lone pair of electrons on the central phosphorus atom of the chelate ring and which undergoes P-methylation and, like a conventional PR₃ ligand, will substitute CO ligands in transition metal complexes; the structures of the complexes [W{σ,η³-C₆H₄(PH₂)(PC{OH}CH{C₆H₄Me-4})-1,2}(CO)(η-C₅H₅)], [Wl{C₆H₄(PH₂)(P{Me}C{O}CH₂{C₆H₄Me-4})-1,2}(CO)(η-C₅H₅)]·(1/2C₄H₈O), and [WCo₃(η₃-CR){µ-C₆H₄(PH₂)(PC{OH}CH{C₆H₄Me-4})-1,2}(CO)₉(η-C₅H₅)](R = H or Me) have been determined by single crystal X-ray diffraction studies.