Abstract
The present paper is devoted to a general methodology to determine effective hamiltonians for various atomic or molecular fragments. These effective operators are derived from the previous knowledge of atomic or molecular wave functions and have an entirely theoretical status. When this formalism is applied to atomic fragments, the corresponding methods belong to the so-called pseudopotential methods, and lead to atomic core effective potentials. The efficiency of our pseudopotential method is shown through one-electron Hartree-Fock valence-only calculations on molecules containing various atoms of the periodic table including transition metal atoms. The calculated values of observables such as bond lengths, bond angles, vibrational force constants and internal rotation barriers are in good agreement with the experimental data when the latter are available.
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© 1976 D. Reidel Publishing Company, Dordrecht, Holland
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Durand, P., Barthelat, J.C. (1976). Effective Molecular Hamiltonians, Pseudopotentials and Molecular Applications. In: Chalvet, O., Daudel, R., Diner, S., Malrieu, J.P. (eds) Localization and Delocalization in Quantum Chemistry. Localization and Delocalization in Quantum Chemistry, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1456-4_7
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