ELECTRONIC SPECTRA OF SOME Ni2+ OCTAHEDRAL COMPLEXES: A PRACTICAL INTRODUCTION TO THE CRYSTAL FIELD THEORY IN THE UNDERGRADUATE COURSE. The experiment introduces the undergraduate students to the crystal field theory. The electronic spectra of the octahedral complexes of [Ni(L)(n)](2+) (L = H2O dmso, NH3 and en) obtained in the experiment are used to calculate 10Dq and B parameters. The experiment shows how the parameters can be calculated and correlated with the nature of the ligands and the field intensities produced.281153156