How well can density functional theory and pair-density functional theory predict the correct atomic charges for dissociation and accurate dissociation energetics of ionic bonds?

Physical Chemistry Chemical Physics : PCCP
Junwei Lucas BaoDonald G Truhlar

Abstract

The accuracy of density functional theory (DFT) is often judged by predicted dissociation energies, but one should also consider charge densities as illustrated here for dissociation of heteronuclear diatomic molecules, including ionic bonds for which local density functionals yield erroneous results. Some hybrid density functionals with 100% exact exchange in Kohn-Sham DFT and the local functionals in multiconfiguration pair-density functional theory give relatively acurate dissociation energies for NaCl, and they correctly yield uncharged dissociated atoms.

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Nov 2, 2017·The Journal of Physical Chemistry Letters·Junwei Lucas BaoDonald G Truhlar
Apr 7, 2018·The Journal of Physical Chemistry Letters·Junwei Lucas BaoDonald G Truhlar

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Citations

Apr 22, 2021·Annual Review of Physical Chemistry·Prachi SharmaLaura Gagliardi
Feb 2, 2019·The Journal of Physical Chemistry. a·Pragya VermaDonald G Truhlar
Jul 23, 2020·Journal of Chemical Theory and Computation·Dayou Zhang, Donald G Truhlar

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Software Mentioned

DFT
KS
Molpro
Molcas
UCCSD
tPBE
BLYP
Gaussian
CASPT2
WFT

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