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Calculated Energies of Hydrogen Bonds

MP2/CEP-121G*

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -23.206427 -11.599869 -11.599869 0.006689 17.6  kJ mol-1
Vibrational zero point energy (cm-1) 15241 7360 7360 -521 -6.2  kJ mol-1
Total         11.3  kJ mol-1