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 NaO2 (Sodium superoxide)

using model chemistry: CCSD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A1
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-312.032880
Energy at 298.15K 
HF Energy-311.549592
Nuclear repulsion energy67.345771
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/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 1225 1170 28.72      
2 A1 433 414 93.10      
3 B2 329 315 3.59      

Unscaled Zero Point Vibrational Energy (zpe) 993.5 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 949.6 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 CCSD/aug-cc-pVTZ
ABC
1.15455 0.28669 0.22966

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 1.242
O2 0.000 0.676 -0.854
O3 0.000 -0.676 -0.854

Atom - Atom Distances (Å)
  Na1 O2 O3
Na12.20282.2028
O22.20281.3512
O32.20281.3512

picture of Sodium superoxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Na1 O2 O3 72.139 Na1 O3 O2 72.139
O2 Na1 O3 35.721
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability