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All results from a given calculation for NaO2 (Sodium superoxide)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A1
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-31.832173
Energy at 298.15K 
HF Energy-31.477373
Nuclear repulsion energy16.472186
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 MP2/CEP-31G*
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 1043 990 0.68 0.00 0.33 0.50
2 A1 398 378 58.78 6615.22 0.34 0.51
3 B2 537625 510422 0.00 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 269533.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 255894.9 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 MP2/CEP-31G*
ABC
1.07788 0.28145 0.22317

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 1.254
O2 0.000 0.699 -0.862
O3 0.000 -0.699 -0.862

Atom - Atom Distances (Å)
  Na1 O2 O3
Na12.22862.2286
O22.22861.3984
O32.22861.3984

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 71.715 Na1 O3 O2 71.715
O2 Na1 O3 36.570
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability