Pd(II) Complexes with 2,2′-Diaminobiphenyl

Abstract

Abstract The new palladium (II) complexes with 2,2′-diaminobiphenyl (DABP) have been synthesized under various conditions. The hexa-coordinated palladium complex, [Pd(DABP)2Cl2], has been prepared under a high pressure. The square planar diamagnetic complexes, [Pd(DABP)2]X2 (X=Cl, Br), have been synthesized under atmospheric pressure. As to the [Pd(DABP)2]Cl2 complexes, two isomers, the yellow complex and the yellow-green complex, are obtained according to the temperature at which the complexes are synthesized. Both the complexes, the yellow and the yellow-green complexes, are similar with respect to the powder X-ray diffraction pattern and the IR spectra in the region from 4000 cm−1 to 200 cm−1, but are somewhat different with respect to the stability to air, the thermal stability, and the solubility in chloroform.