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Calculated Energies of Hydrogen Bonds

MP2/CEP-121G

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -33.926466 -16.956350 -16.956350 0.013765 36.1  kJ mol-1
Vibrational zero point energy (cm-1) 9808 4421 4421 -967 -11.6  kJ mol-1
Total         24.6  kJ mol-1