Abstract
An alternative way of calculating the Fukui function and the partial derivative of second order of the electronic density with respect to the number of electrons N is presented, the new formulas agree with the usual ones but only in cases without degeneracy. The new operative formulas are more general than the previous ones and are the right ones for those problematic cases where one or both of the frontier molecular orbitals are degenerate. Finally, we present a new way of applying the finite difference approximation that leads to more realistic results than the usual formulas.
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Calculations were performed through CICA (Centro Informático Científico de Andalucía).
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Sánchez-Márquez, J. New advances in conceptual-DFT: an alternative way to calculate the Fukui function and dual descriptor. J Mol Model 25, 123 (2019). https://doi.org/10.1007/s00894-019-4000-0
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DOI: https://doi.org/10.1007/s00894-019-4000-0