LIGAND SUBSTITUTION AND NUCLEOPHILIC REACTIVITY OF TRICARBONYL(1-3:5,6-η-CYCLOOCTADIENYLIUM)RUTHENIUM CATION AND ITS DERIVATIVES

Article abstract of DOI:10.1016/0022-328X(83)80201-0

Nucleophilic attack of triphenylphosphine on tricarbonyl(1-3:5,6-η-cyclooctadienylium)ruthenium cation initially gives a phosphonium ion, which, during three weeks isomerizes to the dicarbonyl(4-6-η,1-?-cyclooctenediyl)triphenylphosphineruthenium cation. (This species was also obtained by two other routes.) Nucleophilic attack on the latter of I^- gives dicarbonyl(4-6-η,1-?-cyclooctadienylium)iodoruthenium, which with AgPF6 gives the coordinatively unsaturated dicarbonyl(1-3:5,6-η-cyclooctadienylium)ruthenium cation as an intermediate.Reactions of this cation with triphenylphosphine and with hydride ion give rise, respectively, to dicarbonyl(1-3:5,6-η-cyclooctadienylium)triphenylphosphineruthenium hexafluorophosphate and the metallic hydride dicarbonyl(4-6-η,1-?-cyclooctadienylium)hydrideruthenium.