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Calculated Energies of Hydrogen Bonds

PBEPBEultrafine_cp/6-31G*

Dimer H Donor H Acceptor comment
H2OH2O water dimer H2O Water H2O Water

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -152.652289 -76.322481 -76.322481 0.007326 19.2  kJ mol-1
Vibrational zero point energy (cm-1) 9860 4455 4455 -950 -11.4  kJ mol-1
Total         7.9  kJ mol-1