Study of N—H Frequencies in Some Metal-Halide Chelates of O-Phenylenediamine

Abstract

The infrared studies in connection with the bidentate complexes of o-phenylenediamine were directed toward the study of N–H vibrations. Similar investigations have been undertaken with regard to the N–H stretching and bending vibrations of aniline and α-naphthylamine. Deuteration studies were made. As a result of these studies and by comparison with the assignment of frequencies made in the above mentioned investigations, stretching, scissors, and wagging frequencies are assigned to the chelates of o-phenylenediamine. The absorption in the region of ND₂ wagging vibrations of the deuterated palladium complex failed to show splitting and therefore coupling with the C–H out-of-plane vibrations, as was evident in the spectra of the corresponding complexes of α-napthylamine and aniline.