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Calculated Energies of Hydrogen Bonds

HF/CEP-121G*

Dimer H Donor H Acceptor comment
H2OHCOOH Water formic acid dimer 2 H2O Water HCOOH Formic acid to O=C

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -54.921333 -16.855061 -38.049312 0.016959 44.5  kJ mol-1
Vibrational zero point energy (cm-1) 12366 4576 7196 -593 -7.1  kJ mol-1
Total         37.4  kJ mol-1