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Calculated Energies of Hydrogen Bonds

MP2/LANL2DZ

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -190.188907 -76.135419 -114.042654 0.010834 28.4  kJ mol-1
Vibrational zero point energy (cm-1) 10754 4415 5593 -746 -8.9  kJ mol-1
Total         19.5  kJ mol-1