Allylammonium complexes of palladium(II)

Abstract

Three new allylammonium complexes of palladium(II) are reported: (CH₂:CH·CH₂·NH₃⁺)₂[PdCl₄]^2–, a salt in which there is no covalent bonding between the allylammonium and tetrachloropalladate(II) ions, [Pd(CH₂:CH·CH₂·NH₃)Cl₃] and Na[Cl₂PdCl₂PdCl(CH₂:CH·CH₂·NH₃Cl)] in which the allylammonium groups are co-ordinated by palladium–olefin bonds. The i.r. and Raman spectra of [Pd(CH₂:CH·CH₂·NH₃)Cl₃] indicate considerable mixing of the CC stretching and CH₂ deformation modes, although the CC streching mode appears to make a slightly greater contribution to the band at 1536 cm^–1 and the CH₂ deformation to that at 1270 cm^–1. The electronic spectrum of [Pd(CH₂:CH·CH₂·NH₃)Cl₃] has four bands in the region 20,000–38,500 cm^–1, all with molar extinction coefficients of 210 or less, which are assigned to d–d transitions.