Distinguishable electron method (DEM) for electronic structure calculations. V. Static polarizability of H2 in the screened valence bond (Wang) approximation
- 15 April 1973
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 58 (8), 3315-3319
- https://doi.org/10.1063/1.1679657
Abstract
The distinguishable electron method is used to calculate the static polarizability tensor of H2, at three different internuclear distances, starting with the screened valence bond (Wang) initial approximation. As usual, a first‐order correlation correction is obtained by means of accessible expressions which do not require correlated wavefunctions. Since the polarization potential is linear in the Cartesian electron coordinates, the one‐electron molecular perturbation functions can be determined exactly from pure atomic equations. Our results are comparable to the coupled Hartree‐Fock values, but are obtained much more easily. Finally, it is shown that nonsymmetric perturbation treatments, which ignore exchange, are unsatisfactory because of large errors in determining the first‐order correlation correction.Keywords
This publication has 19 references indexed in Scilit:
- Distorted-atoms-in molecules model for ordinary covalent molecules. I Description of model; connection with distinguishable electron method; and illustrative application to H2, LiH, and BeH+The Journal of Chemical Physics, 1973
- Distinguishable Electron Method (DEM) for Electronic Structure Calculations. IV. Polarizability of Three- and Four-Electron AtomsThe Journal of Chemical Physics, 1972
- Accurate Calculation of the Vibrational Force Constant of the Hydrogen Molecule by Variation–Perturbation TheoryThe Journal of Chemical Physics, 1972
- Two Algorithms for Choosing Optimum Parameters in the Variation–Perturbation Calculation of Physical PropertiesThe Journal of Chemical Physics, 1971
- Distinguishable Electron Method (DEM) for Electronic Structure Calculations. II. Derivation of Accessible Correlation Expressions for Physical Properties and Application to the Polarizability of Two-Electron AtomsThe Journal of Chemical Physics, 1971
- Interchange Theorems, Accessible Correlation Expressions, and Physical PropertiesThe Journal of Chemical Physics, 1970
- Hydrogen-Atom Polarizability as a Hartree–Fock Perturbation Expansion: A Geometric Approximation to Atomic PolarizabilitiesThe Journal of Chemical Physics, 1968
- Polarizability of Molecular HydrogenThe Journal of Chemical Physics, 1968
- On the Polarizability of the Hydrogen MoleculeProceedings of the Physical Society. Section A, 1952
- Über Dispersionskonstanten und kritische Elektronengeschwindigkeiten des molekularen WasserstoffsThe European Physical Journal A, 1925