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Calculated Energies of Hydrogen Bonds

QCISD/cc-pVDZ

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

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -112.804895 -56.398982 -56.398982 0.006930 18.2  kJ mol-1
Vibrational zero point energy (cm-1) 15151 7287 7287 -576 -6.9  kJ mol-1
Total         11.3  kJ mol-1