Experimental and theoretical study of the vibrational spectra of paraphenylenediamine transition metal (II) complexes

The effect of coordination of p-phenylenediamine molecule (PPD) to a transition metal has been investigated by making use of the normal coordinate analysis. The reliable force field of coordinated PPD have been determined by refinement of the free PPD in order to fit the experimental wavenumbers of transition metal (II) PPD complexes. Additionally, CdI(2)(PPD) and MnCl(2)(PPD) complexes have been prepared and their vibrational assignment is provided based on this calculation. (C) 2001 Elsevier Science B.V. All rights reserved