1H NMR study of multiply charged anions of Ni-octaethylporphin

An analysis of¹H NMR spectra of reduced Ni-octaethylporphin (NiOEP)ⁿ⁻ n=2,3) complexes has allowed the conclusion that the first and third excess electrons are localized on orbitals of the porphyrin ligand, while the first excess electron is on the d_x ²-y²-orbital of Ni. This is a basis for thinking that in the course of NiOEP reduction the energy of the lowest unoccupied molecular orbital of the ligand becomes smaller than that of the d_x ²-y²-orbital of nickel. Institute of Molecular and Atomic Physics of the Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 4, pp. 513–517, July–August, 1997.