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Calculated Energies of Hydrogen Bonds

HF/CEP-121G*

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -39.189091 -16.855061 -22.326898 0.007131 18.7  kJ mol-1
Vibrational zero point energy (cm-1) 10869 4576 5730 -563 -6.7  kJ mol-1
Total         12.0  kJ mol-1