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Calculated Energies of Hydrogen Bonds

B3LYPultrafine_cp/6-311+G(3df,2pd)

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -191.019749 -76.464156 -114.549806 0.005788 15.2  kJ mol-1
Vibrational zero point energy (cm-1) 10833 4548 5647 -637 -7.6  kJ mol-1
Total         7.6  kJ mol-1