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

using model chemistry: MP2=FULL/3-21G*

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=FULL/3-21G*
 hartrees
Energy at 0K-309.955060
Energy at 298.15K 
HF Energy-309.685984
Nuclear repulsion energy67.109463
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=FULL/3-21G*
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 968 918 0.19 1284.95 0.41 0.58
2 A1 459 435 38.71 2.40 0.65 0.79
3 B2 499 473 185.26 72.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 962.9 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 912.8 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=FULL/3-21G*
ABC
0.95744 0.32541 0.24287

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 1.166
O2 0.000 0.742 -0.802
O3 0.000 -0.742 -0.802

Atom - Atom Distances (Å)
  Na1 O2 O3
Na12.10312.1031
O22.10311.4838
O32.10311.4838

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 69.344 Na1 O3 O2 69.344
O2 Na1 O3 41.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability