Hydration free energies of molecular ions from theory and simulation

Maksim Misin, Maxim V. Fedorov, David S. Palmer

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59 Citations (Scopus)
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We present a theoretical/computational framework for accurate calculation of hydration free energies of ionized molecular species. The method is based on a molecular theory, 3D-RISM, combined with a recently developed pressure correction (PC+). The 3D-RISM/PC+ model can provide ∼3 kcal/mol hydration free energy accuracy for a large variety of ionic compounds, provided that the Galvani potential of water is taken into account. The results are compared with direct atomistic simulations. Several methodological aspects of hydration free energy calculations for charged species are discussed.
Original languageEnglish
Pages (from-to)975-983
Number of pages9
JournalJournal of Physical Chemistry B
Issue number5
Early online date27 Jan 2016
Publication statusPublished - 11 Feb 2016


  • hydration free energies
  • solvation
  • 3D-RISM
  • molecular dynamics


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