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Calculated Energies of Hydrogen Bonds

B3LYPultrafine_cp/6-31G*

Dimer H Donor H Acceptor comment
HCOOHH2O Formic acid water dimer HCOOH Formic acid H2O Water

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -266.181956 -189.747171 -76.408954 0.025830 67.8  kJ mol-1
Vibrational zero point energy (cm-1) 12591 7051 4452 -1089 -13.0  kJ mol-1
Total         54.8  kJ mol-1