98240-95-0Relevant articles and documents
Cluster chemistry LXIII. Further studies of the thermal behaviour of 2(μ-dppa) (dppa = C2(PPh2)2). Crystal structures of Ru4(μ4-PPh)(μ4-PhC2PPh2)(μ-CO)2(CO)8*MeOH, Ru5(μ4-PPh)3-CCPh(PPh2)>(CO)12, Ru5(μ3-H)(μ4-PPh)4-CCPh(C6H4)>(μ3-PPh)(CO)10 and
Bruce, Michael I.,Liddell, Michael J.,Tiekink, Edward R. T.
, p. 81 - 107 (1990)
Large scale (ca. 2 g) preparations of Ru5(μ5-C2PPh2)(μ-PPh2)(CO)13 (2) by pyrolysis of 2(μ-dppa) have also afforded the complexes Ru4(μ4-PPh)(μ4-PhC2PPh2)(μ-CO)2(CO)8 (3), Ru5(μ-C2PPh2)(μ-PPh2)(CO)15 (4t), Ru4(μ4-C2)(μ-PPh2)2(CO)12 (5), Ru5(μ4-PPh)3-CCPh(PPh2)>(CO)12 (6) and Ru5(μ-H)(μ4-PPh)4-CCPh(C6H4)>(μ3-PPh)(CO)10 (7).The new complexes 6 and 7, identified crystallographically, are formed by heating 2; the evolved CO reacts with 2 to give 4t and 7.Complex 6 contains a square pyramidal Ru5 core, the square face being capped by PPh, and a triangular face by the phosphino-vinylidene ligand, which is formed by migration of Ph from P to Cβ of the C2PPh2 ligand in 2.Complex 7 contains a CPRu5 pentagonal bipyramid, with PPh capping an Ru3 face.Complex 7 reacts with MeOH to give Ru5(μ4-PPh)4-CCPh(C6H4)>(CO)11 (12), with the same core as 7; the μ3-PPh group has been converted to a μ-phosphido ligand.In 7 and 12, the organic fragment is a metallated diphenylvinylidene.Some 31P NMR data for these and related complexes are given and discussed.The crystal structure of 3 as its methanol solvate is also reported.
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
Bruce, Michael I.,Williams, Michael L.,Patrick, Jennifer M.,White, Allan H.
, p. 1229 - 1234 (1985)
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.
Preparation and characterization of the dicarbon cluster complex Ru5(μ5-C2)(μ-SMe) 2(μ-PBu2)2(CO)11
Adams, Chris J.,Bruce, Michael I.
, p. 517 - 520 (2007/10/03)
The preparation of the bis-tertiary phosphine C2(PBu2)2 (dpba) is described. Pyrolysis of the ruthenium carbonyl derivative {Ru3(CO)11}2(μ-dbpa) gives Ru5(μ5-C2/
