Guseinov, Israfil IsaMamedov, BA2025-01-272025-01-2720050259-9791https://doi.org/10.1007/s10910-004-1102-3https://hdl.handle.net/20.500.12428/21919With the help of complete orthonormal sets of psi(alpha) - ETOs, where alpha = 1, 0,- 1,- 2,... a large number of series expansion formulas for the multicenter electronic attraction ( EA), electric field ( EF) and electric field gradient ( EFG) integrals of integer and noninteger n Slater type orbitals ( ISTOs and NISTOs) is established through the overlap integrals with the same screening constants and the new central and noncentral interaction potentials depending on the coordinates of the nuclei of a molecule are introduced. The convergence of the series is tested by calculating concrete cases for arbitrary quantum numbers, screening constants and location of ISTOs and NISTOs.eninfo:eu-repo/semantics/closedAccesselectronic attraction integralselectric field integralselectric field gradient integralsnoninteger principal quantum numbersArticle37435336410.1007/s10910-004-1102-3Q2WOS:0002279630000032-s2.0-17744374487Q2