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)_cp/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at CCSD(T)_cp/6-31+G**
 hartrees
Energy at 0K-112.825048
Energy at 298.15K 
Nuclear repulsion energy 
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)/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31+G**

Point Group is Cs

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability