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Calculated Energies of Hydrogen Bonds

B3LYPultrafine/LANL2DZ

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -190.909775 -76.414317 -114.483601 0.011856 31.1  kJ mol-1
Vibrational zero point energy (cm-1) 10777 4378 5619 -780 -9.3  kJ mol-1
Total         21.8  kJ mol-1