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Calculated Energies of Hydrogen Bonds

B3LYPultrafine/6-31G*

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -152.830148 -76.408954 -76.408954 0.012241 32.1  kJ mol-1
Vibrational zero point energy (cm-1) 9756 4452 4452 -853 -10.2  kJ mol-1
Total         21.9  kJ mol-1