Spectroscopic and Structural Studies of Complex of [CU(DIEN)(CNGE)(ONO₂)₂] (Dien=Diethylenetriamine, CNGE=Cyanoguanid)

Abstract

The electronic absorption spectrum (diffuse reflection spectrum) of the crystal of [Cu(dien)(cnge)(ONO₂)₂] has been measured. The experimental results are interpreted quantitatively with ligand field theory and the radial wave function of non-free copper (II), and our calculation values coincide well with the experimental results. As a result, the d-d absorption spectrum was explained satisfactorily. In particular, the structural characterizations whose degree of distortion of crystal structures of three Copper(II) complexes is different in this paper, are also discussed with their spectral behaviors. The experimental data provides significant correlation between the spectra and degree of distortion of coordination structures.

Key Words:

• electronic absorption spectrum
• copper complex
• ligand field theory and structural studies