Resonance Raman spectra of copper(I) complexes with α-di-imine ligands

Abstract

The resonance Raman spectra of [Cu(ebba)₂]ClO₄[ebba =NN′-ethane-1,2-diylidenebis(t-butylamine)], [Cu(pmba)₂]ClO₄[N-(2-pyridylmethylene)-t-butylamine], and [Cu(bquin)₂]ClO₄(bquin = 2,2′ biquinolyl) have been measured in the region of the metal to ligand charge-transfer absorption between 457 and 600 nm. The interpretation of the resonance Raman enhancement allows a detailed description of the structural and electronic changes upon electronic excitation. This interpretation is in agreement with the results of molecular orbital calculations previously published.