Reactions of co-ordinated ligands. Part V. Reactions of triphenylmethyl tetrafluoroborate and fluoroboric acid with a variety of enyl metal complexes

Abstract

The electrophilic reagents triphenylmethyl tetrafluoroborate and fluoroboric acid react with the enyl complexes (C₈H₁₂acac)M(acac)(M = Pd and Pt), (C₈H₁₂ba) Pt(ba) and (C₈H₁₂dbm)M(dbm)(M = Pd and Pt) to give the cations [C₈H₁₂M(acac)]⁺, and [C₈H₁₂M(dbm)]⁺(acac, ba, and dbm are the conjugate bases of acetylacetone, benzoylacetone, and dibenzoylmethane). Other cations [(diene)M(diketone)]⁺(diene = C₇H₈ or C₁₀H₁₂, diketone = acac, ba, and dbm) are produced similarly. Electrophilic attack by triphenylmethyl tetrafluoroborate is selective and in the reaction with the isomers (C₈H₁₂acac)Pd(dbm) and (C₈H₁₂dbm)Pd(acac) the same cation [C₈H₁₂Pd(dbm)]⁺ is obtained. The halogen-bridged complexes (C₈H₁₂R)₂M₂Cl₂(R = CH(COMe)₂ or OMe) react with thallous cyclopentadienide (TICp) to give the orange oils (C₈H₁₂R)M (π-C₅H₅) and with various phosphine ligands (L) to give (C₈H₁₂R)M(L)Cl. These complexes also react with triphenylmethyl tetrafluoroborate to give the cations [C₈H₁₂M(π-C₅H₅)]⁺ and [C₈H₁₂M(L)Cl]⁺.