Media type: E-Article Title: United Atom Treatment of H2+ Contributor: Levine, Ira N. imprint: AIP Publishing, 1964 Published in: The Journal of Chemical Physics Language: English DOI: 10.1063/1.1726204 ISSN: 0021-9606; 1089-7690 Keywords: Physical and Theoretical Chemistry ; General Physics and Astronomy Origination: Footnote: Description: <jats:p>The exact second-order united atom perturbation energy for the ground state of H2+ is evaluated. The result shows that for small internuclear distance R, the second-order perturbation energy goes as R3.</jats:p>