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Calculated Energies of Hydrogen Bonds

B3LYP/6-31G*

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -192.135333 -76.408954 -115.714407 0.011972 31.4  kJ mol-1
Vibrational zero point energy (cm-1) 16082 4462 10849 -771 -9.2  kJ mol-1
Total         22.2  kJ mol-1