Exchange Effects in the Degenerate Perturbation Theory of Intermolecular Potentials
- 15 April 1968
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 48 (8) , 3639-3644
- https://doi.org/10.1063/1.1669663
Abstract
The contribution of electron exchange to intermolecular potentials is studied using the operator form of perturbation theory, when the noninteracting system of atoms or molecules is degenerate. A symmetry‐adapted, degenerate perturbation theory is developed, including the almost‐degeneracy case. Perturbation expansions are given up to second order in the energy. Differential equations for the perturbed wave‐functions are obtained, as well as their associated variational principles.Keywords
This publication has 18 references indexed in Scilit:
- Intermolecular Forces in the Region of Small Orbital OverlapThe Journal of Chemical Physics, 1967
- New Type of Molecular Perturbation TreatmentThe Journal of Chemical Physics, 1966
- Energy of Interaction between Two MoleculesThe Journal of Chemical Physics, 1966
- The theory of intermolecular forces in the region of small orbital overlapProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1965
- Second order exchange forcesDiscussions of the Faraday Society, 1965
- Validity of the Assumption of Two-Body Interactions in Molecular Physics. IPhysical Review B, 1956
- Atoms in molecules and crystalsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1951
- Van der Waals Potential in HeliumPhysical Review B, 1939
- The Van Der Waals Forces in GasesPhysical Review B, 1931
- Über das Verhältnis der van der Waalsschen Kräfte zu den homöopolaren BindungskräftenThe European Physical Journal A, 1930