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Chemistry of Di- and Tri-metal Complexes with Bridging Carbene or Carbyne Ligands. Part 48. Reactions of the Cluster Complex with (R=Me or C6H4Me-4); Crystal Structures of 3-?:?':η2-C=CH2)(CO)7(η-C5H5)...

DOI: 10.1039/DT9860002105

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2105 - 2112 (1986)

Update date:2022-08-03

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Authors:

Delgado, EstherDelgado, Esther

Jeffery, John C.Jeffery, John C.

Stone, F. Gordon A.Stone, F. Gordon A.

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Article abstract of DOI:10.1039/DT9860002105

In toluene at 80 deg C the compounds and react to give the ditungsten complex -(CO)4(η-C5H5)2> as the major product.In contrast, the corresponding reaction with yields a separable mixture of three cluster complexes:2-C=CH2)(CO)7(η-C5H5)2>, , and with the last formed in trace amounts.The structures of 2-C=CH2)(CO)7(η-C5H5)2> and have been established by X-ray diffraction.In the vinylidene complex an ironditungsten triangle is bridged by C=CH2 ligand in such a manner that the latter is ?-bonded to the tungsten atoms 2-co-ordinated to the iron .The iron atom is bonded by three terminal CO ligands, while the tungsten atoms are each ligated by a C5H5 and two CO groups.Three of the latter weakly semi-bridge the metal-metal bonds.The structure of the alkyne complex is based on a triangle of metal atoms .The MeC2C6H4Me-4 ligand lies on the face of the triangle with its C2 axis parallel to a Fe-W bond.The iron atom carries three CO groupes and the tungsten atoms two such groups and a C5H5 ligand.Three of the tungsten-ligated CO groups semi-bridge the three edges of the metal triangle .The n.m.r. data for the compounds are reported, and possible pathways for formation of the three cluster complexes are discussed.

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Product name:W2C2(C6H4CH3)2(CO)4(C5H5)2

Cas No:85086-14-2

85086-14-2

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