SOLVENT EFFECTS ON THE ELECTRONIC STRUCTURE OF BIS(4-DIMETHYLAMINODITHIOBENZYL) NICKEL II(4-DMAB)> FROM UV-VIS AND EPR SPECTRA

Article abstract of DOI:10.1016/0040-4020(82)80027-6

The UV-VIS and EPR spectra of solutions of Ni^II(4-DMAB) in 10 solvents with donor number (DN) from 0.1 to 38.8 have been recorded.The changes in the spectra are explained in terms of a change in symmetry of the Ni^II(4-DMAB) complex on increase in donor number of the solvent.The symmetry change is from square planar to rhombic bipyramidal with corresponding change in electronic configuration of the nickel ion from d²_z2 to d¹_z2, d¹_x2-y2.Light was observed to accelerate this structural change.