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A remark on the comparison between the roothaan open shell and half-electron method

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Abstract

Using Pople π-electron and CNDO/2 approaches for various open-shell ground states, a comparison is made for total SCF energies calculated by the half-electron and Roothaan methods. Types of electronic configurations are ascertained for which the two methods yield identical total energies.

Zusammenfassung

Unter Anwendung der π-Elektronen- und der CNDO/2-Näherung werden die totalen SCF-Energien für verschiedene “open shell”-Grundzustände im “half electron”-Verfahren und im Roothaanschen Verfahren verglichen. Es werden Typen von elektronischen Konfigurationen ermittelt, für die beide Verfahren zu der gleichen Gesamtenergie führen.

Résumé

En utilisant les méthodes π-électroniques de Pople et CNDO/2 pour des états fondamentaux avec couche incomplète différente, on fait la comparaison pour les énergies totales de champs autocohérent calculées par la méthode «sémiélectronique» et celle de Roothaan. On a determiné les types des configurations électroniques pour lesquels ces deux méthodes livrent les énergie totales identiques.

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Čársky, P., Zahradník, R. A remark on the comparison between the roothaan open shell and half-electron method. Theoret. Chim. Acta 26, 171–178 (1972). https://doi.org/10.1007/BF00526545

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  • DOI: https://doi.org/10.1007/BF00526545

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