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DOI: 10.1039/A708030A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1998, 1053-1056

Synthesis and skeletal isomerization of the phosphinidene acetylide cluster complexes [Ru4(CO)10(µ4-PPh)(CCPh){WL(CO)}] where L = C5Me5 or C5H5

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Wen-Cheng Tseng, Yun Chi, Chi-Jung Su, Arthur J. Carty, Shie-Ming Peng and Gene-Hsiang Lee

Abstract

Reactions of the phosphinidene cluster [Ru4(CO)13(µ3-PPh)] with tungsten acetylide complexes [WL(CO)3(CCPh)] (L = C5Me5 or C5H5) gave interconvertible isomers of formula [Ru4(CO)10(µ4-PPh)(CCPh){WL(CO)}]. The structures of the two C5Me5 derivatives were determined by X-ray diffraction, showing a novel WRu4P octahedral core arrangement, in which the acetylide ligand is co-ordinated to a WRu2 triangle with its C–C vector bridging the Ru–Ru edge. For one isomer the phosphinidene ligand is located at the position trans to the W atom, while in the second isomer it is at the cis position. Possible mechanisms for this rare example of skeletal isomerization are suggested.

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