Synthesis and structural characterization of the first donor-stabilized phosphanetriylphosphonium cation: [Ar*PP(PPh3)]+(Ar*= 2,4,6-But3C6H2)

Abstract

Reaction of Ar*PPNR₂(Ar*= 2,4,6-Bu^t₃C₆H₂) with CF₃SO₃H in the presence of triphenylphosphane in CH₂Cl₂produces the isolable salt [Ar*PP(PPh₃)]⁺[CF₃SO₃]^– which is characterized by X-ray crystallography; the triphenylphosphane ligand of [Ar*PP(PPh₃)]⁺ readily participates in nucleophilic substitution reactions affording a novel entry to donor-stabilized phosphanetriylphosphonium cations and P-functionalized diphosphenes.