Guseinov, Israfil IsaErtuerk, M.Sahin, E.Aksu, H.Bagci, A.2025-01-272025-01-2720080009-4536https://doi.org/10.1002/jccs.200800045https://hdl.handle.net/20.500.12428/25820Combined Hartree-Fock-Roothaan calculations have been performed using noninteger n Slater type orbitals for the ground states of the lowest electron configurations 1s(2)2s(2)2p(n) (2 <= n <= 6) for negative ions of B, C, N, O and F. These results are compared with the corresponding results obtained from the use of integer n Slater type orbitals. All of the nonlinear parameters are fully optimized. The results of calculation of coupling-projection coefficients, orbital and total energies and virial ratios are presented. It is shown that the noninteger n Slater type orbitals, in general, improve the orbital energies.eninfo:eu-repo/semantics/closedAccessopen shell theorynoninteger n Slater type orbitalsatomic negative ionscoupling-projection coefficientsArticle55230330610.1002/jccs.200800045Q3WOS:0002589373000092-s2.0-44149113980Q2