Zerovalent platinum chemistry. Part VII. Oxidative addition of diazonium salts to triphenylphosphine derivatives of platinum(0)

Abstract

Compounds of formula [(PPh₃)₃PtN:N·C₆H₄R-p]⁺(X^–)(R = NO₂, F, H, OMe, Me and X = BF₄; R = NMe₂, NEt₂ and X = BPh₄) have been obtained by interaction of Pt(PPh₃)₃ with diazonium salts. Similar derivatives could not be isolated by allowing [Pt(PPh₃)₂L](L = CH₂:CH₂, CH₂:CHCN) to react with diazonium salts. The reactivity of the platinum–azo-compounds towards H₂, O₂, HX (X = Cl^–, BF₄^–, ClO₄^–) and LiX (X = Cl^–, I^–, N₃^–) has been studied and rearrangements caused by solvents or light have also been investigated. I.r., ¹H n.m.r. and electronic spectra are reported and discussed.