Abstract
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 1 have been recorded. The changes in the spectra are 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 correspoding change in electronic configuration of the nickel ion from d 2 z 2 to d 1 z 2 , d 1 x 2 -y 2 . Light was observed to accelerate this structural change.
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