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Calculated Energies of Hydrogen Bonds

PBEPBE_cp_opt/6-31G*

Dimer H Donor H Acceptor comment
HCONH2CN2H4 formamide aminomethanimine dimer CHONH2 formamide NHCHNH2 aminomethanimine both are donors

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -319.536721 -169.696576 -149.815501 0.024643 64.7  kJ mol-1
Vibrational zero point energy (cm-1) 22505 9505 12303 -696 -8.3  kJ mol-1
Total         56.4  kJ mol-1