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Calculated Energies of Hydrogen Bonds

B3LYPultrafine_cp/6-31G*

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -113.100553 -56.547948 -56.547948 0.004658 12.2  kJ mol-1
Vibrational zero point energy (cm-1) 15155 7261 7261 -633 -7.6  kJ mol-1
Total         4.7  kJ mol-1