Studies on Absorption Spectra of Ni++ Ion in NiCl2 in Different Organic Solvents

The absorption spectra of Ni++ ion in NiCl2 in six different organic solvents were studied with a Hilger Uvispek spectrophotometer from 10 000 to 3900 Å. A comparison between the calculated and observed values of oscillator strength strengthens our view that electric dipole transition coupled with vibration give rise to these bands. From the lowering of the term separation the covalency factor is found to vary between 0.85 and 0.89 for the different solvents. The deduced g- and magnetic moment have almost the same value in all the solvents. The cubic field coefficient in some solvents is found to be smaller than that in aqueous solution. The cluster about the Ni++ ion appears to be more anisotropic than in aqueous solution.