VIBRATIONAL STUDY OF N-PHENYL-SUBSTITUTED HYDROXYNAPHTHYLALDIMINATE COPPER(II) COMPLEXES

The infrared spectra of seven bis(N-phenyl-substituted hydroxynaphthyl aldiminate) complexes of Cu(II) were scanned from 4000 to 100 cm-1. Pa rticular emphasis is given to the low-energy region. The assignment of the chelate normal modes is supported by an approximate normal coordi nate analysis based on a simplified general valence force field, and t he geometrical parameters of the bis(N-phenylsalicylaldiminate)Cu(II) complex. The bands near 390 and 285 cm-1 are assigned to the CuO and C uN stretching vibrations, respectively. The corresponding force consta nts are estimated to be 1.37 and 0.88 mdyn angstrom-1. Influence of th e nature of the different ligands on the structure of complexes is dis cussed. Similarity of the vibrational spectra for all the complexes su ggests that they possess the same type of structure.