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Cluster Chemistry. Part 32. Synthesis and X-Ray Crystal Structure of 5-η2-C2PPh2-P)(μ-PPh2)(CO)13>, a Complex containing an Alkynyl Ligand in Extended Interaction with an Open Ru5 Cluster

DOI: 10.1039/DT9850001229

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1229 - 1234 (1985)

Update date:2022-08-11

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Authors:

Bruce, Michael I.Bruce, Michael I.

Williams, Michael L.Williams, Michael L.

Patrick, Jennifer M.Patrick, Jennifer M.

White, Allan H.White, Allan H.

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Article abstract of DOI:10.1039/DT9850001229

The radical ion-initiated reaction between and C2(PPh2)2(dppa)(in 2:1 ratio) gives <2(μ-dppa)> (2), in which the acetylenic bis-tertiary phosphine bridges two monosubstituted Ru3 clusters.On heating (90 deg C, 1 h), complex (2) is converted into 5-η2-C2PPh2-P)(μ-PPh2)(CO)13> (3) in 88percent yield, which was characterised by an X-ray study at 295 K.The complex contains a seven-electron donor C2PPh2 ligand interacting with all five Ru atoms of an open Ru5 cluster consisting of three edge-fused Ru3 triangles (a 'swallow' cluster); the PPh2 group bridges the non-fused edge of the central triangle.Some comparisons with 5-CNBut)(CO)14(CNBut)> and 5-C2Ph)(μ-PPh2)(CO)14> are made.Crystals of complex (3) are monoclinic, space group p21/n, with a=17.00(1), b=17.394(9), c=14.260(7) Angstroem, β=92.89(4) deg , and Z=4; the structure was refined by least-squares methods to a residual of 0.031 for 6 364 independent 'observed' reflections.

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