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Atomic parameters for semi-empirical SCF-LCAO-MO calculations

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Abstract

Atomic core and electron-repulsion components of the Hamiltonian matrix elements, for s and p valence orbitals, have been evaluated from atomic valence-state energies. Atomic parameters for semi-empirical, self-consistent field, molecular-orbital calculations with the “complete neglect of differential overlap” (CNDO) approximation are given for non-transition elements of the first four rows of the periodic table. The application of these parameters to the evaluation of interatomic parameters for calculations with the CNDO approximation is discussed.

Zusammenfassung

Für die Elemente der ersten vier Reihen des Periodensystems (mit Ausnahme der Übergangselemente) werden atomare Parameter für halbempirische SCF-MO Rechnungen mit der CNDO Näherung gegeben. Es wird die Anwendung dieser Parameter zur Bestimmung interatomarer Größen, die für Rechnungen mit der CNDO Näherung gebraucht werden, diskutiert.

Résumé

Les énergies des états de valence atomiques sont utilisées pour évaluer les éléments de la matrice hamiltonienne dans la base des orbitales de valence s et p. Des paramètres atomiques sont fournis pour les éléments des quatre premières périodes de la table périodique (á l'exception des éléments de transition). Ces paramètres sont utilisables pour des calculs semi-empiriques dans la méthode SCF-MO avec «recouvrement différentiel nul» (CNDO). L'application de ces paramètres à l'évaluation de paramètres interatomiques pour des calculs dans l'approximation CNDO est discutée.

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Sichel, J.M., Whitehead, M.A. Atomic parameters for semi-empirical SCF-LCAO-MO calculations. Theoret. Chim. Acta 7, 32–40 (1967). https://doi.org/10.1007/BF00537366

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