Preparation, nuclear magnetic resonance spectra, and X-ray diffraction study of bis(N-benzylacetimidic acid ethyl ester)dichloropalladium(II)

Abstract

N-Benzylacetimidic acid ethyl ester (L) yields a stable complex of the type trans-[PdCl₂L₂] with the nitrogen atoms as σ donors. This is not readily convertible to an ortho-palladated complex. An X-ray crystallographic study reveals a centrosymmetric structure [monoclinic, space group P2₁/c, a= 9.983(4), b= 9.492(23), c= 14.111(10)Å, β= 114.02(4)°, and Z= 2]. Splitting of the ¹H n.m.r. signal corresponding to the CH₃Cgroup is attributed to the presence of two slowly interconverting rotamers (probably about the Pd–N bond), while a more rapid fluxional mode must be responsible for the temperature variation in the chemical shift of the CH₂O groups.