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Calculated Energies of Hydrogen Bonds

HF_cp/6-31+G**

Dimer H Donor H Acceptor comment
H2OH2CO water formaldehyde dimer H2O Water H2CO Formaldehyde

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -189.912060 -76.031231 -113.874558 0.006271 16.5  kJ mol-1
Vibrational zero point energy (cm-1) 0 4588 5745 10333 123.6  kJ mol-1
Total         140.1  kJ mol-1