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Calculated Energies of Hydrogen Bonds

B3LYP/CEP-121G*

Dimer H Donor H Acceptor comment
NH3NH3 Ammonia Dimer NH3 Ammonia NH3 Ammonia

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -23.429770 -11.711803 -11.711803 0.006164 16.2  kJ mol-1
Vibrational zero point energy (cm-1) 15200 7352 7352 -496 -5.9  kJ mol-1
Total         10.3  kJ mol-1