The normal coordinate analysis and infrared spectrum of bis(glycinamido)copper(II)monohydrate

The infrared spectra of bis(glycinamido)copper(II) monohydrate and its N-deuterated analog have been measured from 4000 to 200 cm−1. In order to compare the strength of CuN(amido) and the CuN (amino) bonds, a normal coordinate analysis has been carried out on the 1:1 (metal-ring) model. The results indicate that the stretching force constants of the CuN(amido) and CuN(amino) bonds are 1.02 and 0.88 mdyn/ Å, respectively. It has been shown in general that the CuN bond becomes stronger as the net negative charge on the nitrogen atom increases.