Open-Shell SCF-CI Calculations for Radical Cations of Dihydroxynaphthalenes with C2v and C2h Symmetry
Z.H. Khan
Department of Physics, Jamia Millia Islamia, Jamia Nagar, New Delhi-110025, India
Received: June 19, 1991
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Electronic spectra of radical cations of dihydroxynaphthalenes with C2v and C2h symmetry are calculated using an open-shell SCF method with configuration interaction (CI). The characteristic behaviour of electronic transitions depending on the positions of the hydroxyl substituents is discussed. An interesting aspect of this work is the estimation of the first ionization potentials (IP's) of neutral dihydroxynaphthalenes from the energy of the lowest non-Koopmans state for their radical cations. This method for the prediction of IP's is found to be at least as good as that of the Koopmans' theorem with energy correction due to bond perturbation.
DOI: 10.12693/APhysPolA.80.29
PACS numbers: 31.20.-d