Preparation and vibrational spectra of square-planar palladium(II) complexes of the type trans-PdX2(SR2)2

Abstract

A series of square-planar palladium(II) complexes of the type trans-PdX₂(SR₂)₂[X = Cl, Br, or I and SR₂= SMeEt, SC₄H₈, SEt₂, SPrⁱ₂, S(CH₂·Ph)₂, or SPhMe], have been synthesised, most for the first time, and their i.r. and laser Raman spectra recorded for the range 400–70 cm.^–1 Assignments for most of the fundamentals are presented in terms of the skeletal D_2h symmetry. It is concluded that the principal fundamentals occur in the following ranges: ν_a(PdCl)= 353–370, ν_s(PdCl)= 303–309, ν_a(PdBr)= 250–284, ν_s(PdBr)= 188–201, ν_a(Pdl)= 178–202, ν_s(Pdl)= 136–139, and ν(PdS)= 270–330 cm.^–1. The vibrational spectra of the free ligands are also presented.