Cluster chemistry. XC. Some complexes obtained from reactions between M3(CO)12 (M = Ru or Os) or Ru3(μ-dppm)(CO)10 and 2-substituted triphenylphosphines and related keto-phosphine ligands

Article abstract of DOI:10.1016/0022-328X(94)80013-8

Several complexes of the type M3Ln have been prepared and their reactions studied.Predominant were H-migrations from the aryl substituent X to cluster; less facile were C-C bond cleavage reactions, and P-C bond cleavages were not observed.Under the conditions used, the complexes Ru3(CO)11 were transient intermediates in the formation of Ru3(μ-H)<μ-PPh2(C6H4(X-H)-2)>(CO)9; the analogous Ru3(μ-dppm) and Os3(μ-dppm) complexes were more robust.Similar reactions were found for clusters made by reaction of Ru3(CO)12 and related complexes with PPh2, in which H-migration from the ligand to the cluster results in formation of a phosphino-enolate system.X-ray structures are reported for the complexes Os3(CO)11 , Ru3(μ-dppm)(CO)9 , Ru3(μ-H)<μ-PPh2(C6H4Y-2)>(CO)9 , Ru3(μ-H)<μ-PPh2>(μ-dppm)(CO)7, Ru3(μ-H)(μ-dppm)<μ-PPh2(C6H4NH-2)>(CO)7 and Os3(μ-H)<μ-PPh2(C6H4CO-2)>(CO)9. Key words: Ruthenium; Osmium; Carbonyl; Functional phosphines