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Calculated Energies of Hydrogen Bonds

HF/6-31+G**

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -112.406022 -56.200912 -56.200912 0.004198 11.0  kJ mol-1
Vibrational zero point energy (cm-1) 15052 7288 7288 -476 -5.7  kJ mol-1
Total         5.3  kJ mol-1