The chemistry of co-ordinated ligands. Part III. The reaction of the triphenylmethyl cation with some transition-metal complexes of cyclo-octa-1,5-diene, dicyclopentadiene, and norbornadiene

Abstract

Cyclopentadienyl(cyclo-octa-1,5-diene)iridium reacts with 1 and 2 mol. of triphenylmethyl fluoroborate to give Ph₃C·C₅H₄lrC₈H₁₂ and Ph₃C·C₅H₄lrC₈H₁₁⁺ respectively. The cation C₅H₅CoC₁₀H₁₁⁺ derived from dicyclopentadiene, has been synthesised and its n.m.r. spectrum assigned. The reaction between cyclopentadienyl(norbornadiene)-cobalt and triphenylmethyl fluoroborate in dichloromethane is complex. The cation C₅H₅CoC₇H₉⁺ has been obtained from the aqueous extract of the reaction mixture and the overall stoicheiometric result is protonation. The three cations add nucleophiles to give neutral derivatives.