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: TPSSh/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A1
Energy calculated at TPSSh/6-31G*
 hartrees
Energy at 0K-312.643948
Energy at 298.15K 
HF Energy-312.643948
Nuclear repulsion energy68.657575
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 TPSSh/6-31G*
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 1154 1107 1.25 26.62 0.29 0.45
2 A1 432 415 39.23 23.99 0.13 0.23
3 B2 377 362 0.82 25.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 982.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 942.1 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 TPSSh/6-31G*
ABC
1.13890 0.30992 0.24362

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Na1 0.000 0.000 1.195
O2 0.000 0.680 -0.822
O3 0.000 -0.680 -0.822

Atom - Atom Distances (Å)
  Na1 O2 O3
Na12.12822.1282
O22.12821.3604
O32.12821.3604

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 71.360 Na1 O3 O2 71.360
O2 Na1 O3 37.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Na 0.662      
2 O -0.331      
3 O -0.331      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 7.710 7.710
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.556 0.000 0.000
y 0.000 3.700 0.000
z 0.000 0.000 2.726


<r2> (average value of r2) Å2
<r2> 43.148
(<r2>)1/2 6.569