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Calculated Energies of Hydrogen Bonds

MP2_cp_opt/3-21G

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) -316.867242 -168.304141 -148.541496 0.021605 56.7  kJ mol-1
Vibrational zero point energy (cm-1) 22784 9662 12058 -1064 -12.7  kJ mol-1
Total         44.0  kJ mol-1