return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for NH3NH3 (Ammonia Dimer)

using model chemistry: CCSD(T)/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at CCSD(T)/aug-cc-pVQZ
 hartrees
Energy at 0K-112.995873
Energy at 298.15K 
HF Energy-112.448535
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.683957
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD(T)/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/aug-cc-pVQZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/aug-cc-pVQZ

Point Group is C2h

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability