Popis: |
All electrons SCF-LCAO-MO computations for adenine, cytosine, guanine and thyamine are reported. In addition, to compute the total energies and wave functions we have computed the relative gross charges and the dipole moment. Analysis of the orbital energy for the inner shell indicates that there are three effects which govern the orbital energies splitting for inner shell a) the gross charge, or ionicity degree, of the atom in consideration, b) its valency state, c) the neighbor atoms ionicities. The first two effects are sufficient for determining the relative location of the inner shell as well as for estimating the extrema of the splitting of the inner shell electrons of a given type of atoms. |