The CN stretching frequency in the infrared spectra of Schiff's base complexes—I. Copper complexes of salicylidene anilines

Abstract

The CN stretching frequency in seventeen substituted salicylidene aniline—copper (II) complexes is assigned both in the solid state and in solution. In Nujol mulls, the CN stretching frequency is found at 1603–1616 cm −1, while in methylene chloride solution, the band is shifted slightly to 1602–1612 cm −1. In the copper (II) complexes, the phenolic CO appears in the region 1310–1330 cm −1 as compared to 1265–1288 cm −1 in the free anils.