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• W2051684732 abstract "Treatment of [W2Pt(µ-CC6H4Me-4)2(CO)4(η-C5H5)2] in thf (tetrahydrofuran) with [Ru(CO)4(η-C2H4)] in light petroleum affords the tetranuclear metal cluster compound [W2RuPt(µ-CC6H4Me-4)-(µ3-CC6H4Me-4)(CO)7(η-C5H5)2]. The latter with 1 equivalent of PMe2Ph gives [W2RuPt-(µ-CC2H4Me-4)(µ3-CC2H4Me-4)(CO)6(PMe2Ph)(η-C5H5)2], the structure of which has been established by X-ray diffraction. One p-tolylmethylidyne group caps three metal atoms WRuPt [W–Ru 2.743(1), W–Pt 2.729(1), and Ru–Pt 2.875(1)Å] in an essentially symmetrical manner. The ruthenium atom carries two carbonyl groups and the phosphine ligand [Ru–P 2.271(4)Å]. The tungsten atom is co-ordinated by a C5H5 ring and two CO ligands, but the latter asymmetrically bridge the W–Pt and W–Ru bonds [W–C–O 160(1) and 157(1)°, respectively]. The WRuPt triangle is linked through the Pt atom to a W(CC6H4Me-4)(CO)2(η-C5H5) fragment via a W–Pt bond [2.733(1)Å] and a bridging µ-CC6H4Me-4 ligand [µ-C–W 1.92(1), µ-C–Pt 2.03(1)Å]. One of the CO groups attached to the W atom weakly semi-bridges the W–Pt bond [W–C–O 170(1)°]. The reaction between [Ru(CO)4(η-C2H4)] and [W2Pt2(µ-CC6H4Me-4)(µ3-CC6H4Me-4)(CO)4(cod)–(η-C5H5)2](cod = cyclo-octa-1,5-diene) gives a hexanuclear metal cluster [W2Ru2Pt2-(µ3-CC6H4Me-4)2(µ-CO)2(CO)9(η-C5H5)], the structure of which has also been determined by X-ray diffraction. For descriptive purposes, five of the metal atoms [W(2)Ru(1)Ru(2)Pt(1)Pt(2)] may be regarded as occupying vertices of a ‘trigonal bipyramid’ but one in which two of the metal–metal bonds [Pt(1)⋯ Pt(2) 3.064(4), Ru(1)⋯ Pt(2) 3.259(2)Å] are absent. Allowing for this, the ruthenium atoms occupy the apical sites, and the two platinum atoms and the tungsten atom occupy equatorial sites. The Pt(1) atom, in addition to being part of the open metal framework, is attached via a WPt bond [2.663(3)Å] to an external W(CO)3(η-C5H5) fragment. One of the CO ligands on this W(1) atom asymmetrically bridges the W(1)Pt(1) linkage [W(I)–C–O 156(3), Pt(1)–C–O 122(2)°]. Both ruthenium atoms carry three terminal CO groups. The Pt(2) atom, ligated only by two of the metal atoms [W(2) and Ru(2)] in the framework, carries a terminal CO group, and the Pt(2)–Ru(2) bond is bridged by a CO ligand [Ru(2)–C–O 136(3), Pt(2)–C–O 143(4)°]. The W(2) atom carries a C5H5 ring. Both p-tolylmethylidyne groups occupy triply bridging sites. These are on the same side of the Pt(1)W(2)Pt(2) plane, one ligand caps the W(2)Ru(1)Pt(1) triangle, the other spans the atoms Pt(2), W(2), Ru(1). The n.m.r. spectra of the new mixed-metal clusters are reported and discussed." @default.
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• W2051684732 date "1989-01-01" @default.
• W2051684732 modified "2023-09-27" @default.
• W2051684732 title "Chemistry of polynuclear metal complexes with bridging carbene or carbyne ligands. Part 95. Synthesis and crystal structures of [W2RuPt(µ-CC6H4Me-4)(µ3-CC6H4Me-4)(CO)6(PMe2Ph)(η-C5H5)2] and [W2Ru2Pt2(µ3-CC6H4Me-4)2(µ-CO)2(CO)9(η-C5H5)2]" @default.
• W2051684732 doi "https://doi.org/10.1039/dt9890002289" @default.
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