Far-infrared study of palladium(II)–halogen complexes with chelating ligands containing nitrogen and σ carbon as donor atoms

Abstract

I.r. spectra of palladium(II) halogeno-bridged complexes of the type [Pd(N–C)X]₂= azobenzene-2-C,N; NN-dimethylbenzylamine-2-C,N; and 2-methoxy-3-NN-dimethylaminopropyl; X = Cl or (Br) have been recorded in the range (600–120 cm.^–1). The bridging-halogen stretching frequencies are discussed on the basis of a planar asymmetric Pd[graphic omitted]Pd unit.

Bridge-splitting reactions with mono- and bi-dentate ligands bearing nitrogen or phosphorous as donor atoms are reported and the structures of the resulting products are interpretated on the basis of their far-i.r. spectra. We have also established that the v(Pd–Cl) frequency in the products in the range 300–280 cm.^–1 with chloride in the trans-position to the phenyl or alkyl groups.