Abstract
Atomic effective one-electron potentials in a compact analytic form in terms of a few Gaussian charge distributions are developed, for hydrogen through nobelium, for starting molecular electronic structure calculations by a simple diagonalization. For each element, all terms but one are optimized in an isolated-atom Hartree–Fock calculation, and the last one is parametrized on a set of molecules. This one-parameter-per-atom model gives a good starting guess for typical molecules and may be of interest even on its own.
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Laikov, D.N., Briling, K.R. Atomic effective potentials for starting molecular electronic structure calculations. Theor Chem Acc 139, 17 (2020). https://doi.org/10.1007/s00214-019-2521-3
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DOI: https://doi.org/10.1007/s00214-019-2521-3