If they are bare protons, the Coulomb repulsion is simply 1/r, where r is their separation. If the protons carry some electrons, you may need to use Mayer's energy decomposition analysis or interacting quantum atoms (IQA) to study their Coulomb repulsion.
Best,
Tian
]]>Is it possible to calculate the Coulomb repulsion between two protons in a molecule by using ORCA and MultiWFN?
Thank you very much for your help
Stefanos Zoidis
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