X-ray absorption near edge studies of some binuclear copper(II) complexes

X-ray K-absorption near edge studies have been carried out on the binuclear copper (II) dithiocarbamate (dtc) complexes having the following general structure: [structure in text] where R = me (methyl); et (ethyl); npr (normal propyl); chx (cyclohexane) It has been found that the chemical shift values are higher in the chlorine adducts as compared to the values of chemical shift reported by us in an earlier work for the parent complexes, showing that the chlorine adducts are more ionic. The observed splitting of the principal absorption maximum (1s-4p) in the chlorine adducts has been explained in terms of the splitting of the metal 4p orbital degeneracy.