(1) Department of Mathematics, The University, Nottingham, UK;(2) Theoretical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece;(3) School of Chemistry, The University, Newcastle-upon-Tyne, UK
Abstract:
Limited Configuration Interaction wave functions based on Unrestricted Hartree-Fock natural orbitals are found to be easy to compute and to give much more satisfactory spin densities than are provided by techniques currently in use.