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Calculated Energies of Hydrogen Bonds

PBEPBE_cp/3-21G

Dimer H Donor H Acceptor comment
H2OCH3OH water methanol dimer H2O Water CH3OH Methyl alcohol

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -190.821396 -75.886477 -114.928818 0.006101 16.0  kJ mol-1
Vibrational zero point energy (cm-1) 16020 4169 10737 -1114 -13.3  kJ mol-1
Total         2.7  kJ mol-1