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Calculated Energies of Hydrogen Bonds

QCISD/aug-cc-pVTZ

Dimer H Donor H Acceptor comment
H2OH2O water dimer H2O Water H2O Water

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -152.676219 -76.334167 -76.334167 0.007884 20.7  kJ mol-1
Vibrational zero point energy (cm-1) 9812 4551 4551 -710 -8.5  kJ mol-1
Total         12.2  kJ mol-1