Synthesis and Characterisation of Novel Phosphido- and Selenido-substituted Ruthenium Carbonyl Clusters

DOI: 10.1039/DT9930000973

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 973 - 980 (1993)

Update date:2022-08-17

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Authors:

Johnson, Brian F. G.

Layer, Teresa M.

Lewis, Jack

Raithby, Paul R.

Wong, Wing-Tak

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Article abstract of DOI:10.1039/DT9930000973

Reaction of the cyclic organophosphorus ligand P4Bu^t4 1 with ot under forcing conditions yields a number of novel phosphido- and phosphinidene-substituted ruthenium carbonyl clusters.Three products have been structurally characterised in reasonable yield: t)4> 2, where a square-planar arrangement of four ruthenium atoms is capped above and below the metal-atom plane by two tert-butylphosphinidene ligands, and additionally two μ-phosphinidene ligands bridge two Ru-Ru edges; t)> 3 in which the five ruthenium atoms adopt a square-pyramidal geometry with the square-basal plane cap ped by a tert-butylphosphinidene ligand; and t)3> 4, where the six ruthenium atoms define an octahedron with triply-bridging phosphinidene groups capping three triangular faces.Clusters 2 and 4 were isolated from the thermolysis of compound 1 with the tetraruthenium substrate ; cluster 3 is a product of the thermolysis of 1 with .In addition, the cluster 5 has been isolated by the vacuum pyrolysis of with Ph2Se2 at 185 deg C.Reaction of this cluster with 1,3-bis(diphenylphosphino)propane (dppp) at room temperature affords the triruthenium phosphine-substituted cluster 6.The structures of clusters 5 and 6 have also been established by single crystal X-ray analysis.

Full text of DOI:10.1039/DT9930000973

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