Arene carbonyl rhodium(I) complexes

Article abstract of DOI:10.1139/v82-154

The arene carbonyl rhodium complexes PF6 and PF6 have been prepared by treating the dimeric complexes, 2 with AgPF6 in the presence of hexamethylbenzene.The reaction of PF6 with tetrafluorobenzobarrelene affords PF6.On the other hand, the reaction of PF6 with a stoichiometric amount of triphenylphosphine gives PF6 (arene = C6Me6 or C6H3Me3), whereas with excess of this ligand PF6 is formed.The related PF6derivative has also been prepared.The reactivity of both hexamethylbenzene carbonyl rhodium complexes has been examined.The addition of bipyridine to solutions of PF6 (L = CO or PPh3) causes the immediate displacement of the coordinated hexamethylbenzene.Their reactions with the nucleophiles, acetylacetone, tropolonate, or pyrazolate in the presence of triethylamine afford neutral derivatives of the type x (L = CO or PPh3; A = acac or trop, x = 1; A = pz, x = 2).