return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NaS (Sodium sulfide)

using model chemistry: QCISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 2Π
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-559.403717
Energy at 298.15K-559.404098
HF Energy-559.359510
Nuclear repulsion energy35.951839
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 QCISD/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 302 291 19.96      

Unscaled Zero Point Vibrational Energy (zpe) 151.0 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 145.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at QCISD/6-31G
B
0.18783

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 -1.535
S2 0.000 0.000 1.055

Atom - Atom Distances (Å)
  Na1 S2
Na12.5906
S22.5906

picture of Sodium sulfide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability