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

using model chemistry: MP2/CEP-121G

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-121G
 hartrees
Energy at 0K-31.700200
Energy at 298.15K 
HF Energy-31.435932
Nuclear repulsion energy15.704350
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-121G
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 860 840 0.26 461865.40 0.33 0.50
2 A1 382 373 44.81 536.44 0.32 0.49
3 B2 448 438 383.26 172.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 845.6 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 825.3 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-121G
ABC
0.95233 0.29701 0.22640

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 1.221
O2 0.000 0.744 -0.839
O3 0.000 -0.744 -0.839

Atom - Atom Distances (Å)
  Na1 O2 O3
Na12.19012.1901
O22.19011.4877
O32.19011.4877

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 70.144 Na1 O3 O2 70.144
O2 Na1 O3 39.712
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability