A study of substitution reactions in Rh6(CO)16 using simple and polymer bound phosphine ligands
1975; Elsevier BV; Volume: 15; Linguagem: Inglês
10.1016/s0020-1693(00)93930-6
ISSN1873-3255
AutoresKenneth. Iwatate, Sunil Dasgupta, Reinhard Schneider, Graeme C.M. Smith, Kenneth L. Watters,
Tópico(s)Catalysis and Oxidation Reactions
ResumoSubstitution of phosphines for CO on Rh6(CO)16 as been studied. Controlled addition of triphenylphosphine or of tris-(2-diphenylphosphinoethyl)phosphine to Rh6(CO)16 resulted in displacement of 1–3 carbonyl ligands to form compounds of general formula Rh6(CO)16−nLn. Increased substitution to n > 6 produced unstable materials which were difficult to characterize. These reactions are compared with the reaction of Rh6(CO)16 with phosphine substituted polystyrene to produce polymer bound Rh6 clusters. Spectroscopic evidence for a very close similarity between the polymer bound rhodium species and the homogeneous phase complexes is presented.
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