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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) -23.398460 -11.695565 -11.695565 0.007330 19.2  kJ mol-1
Vibrational zero point energy (cm-1) 15155 7243 7243 -669 -8.0  kJ mol-1
Total         11.2  kJ mol-1