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Calculated Energies of Hydrogen Bonds

QCISD/6-31G

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -112.592698 -56.292312 -56.292312 0.008074 21.2  kJ mol-1
Vibrational zero point energy (cm-1) 15335 7296 7296 -742 -8.9  kJ mol-1
Total         12.3  kJ mol-1