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 O2 (Oxygen diatomic)

using model chemistry: PBEPBE/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 3Σg
Energy calculated at PBEPBE/CEP-31G*
 hartrees
Energy at 0K-31.823342
Energy at 298.15K-31.823336
HF Energy-31.823342
Nuclear repulsion energy15.317712
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 PBEPBE/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 Σg 1575 1575 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 787.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 787.6 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 PBEPBE/CEP-31G*
B
1.36278

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.622
O2 0.000 0.000 -0.622

Atom - Atom Distances (Å)
  O1 O2
O11.2437
O21.2437

picture of Oxygen diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O 0.000      
2 O 0.000      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -9.898 0.000 0.000
y 0.000 -9.898 0.000
z 0.000 0.000 -10.304
Traceless
 xyz
x 0.203 0.000 0.000
y 0.000 0.203 0.000
z 0.000 0.000 -0.406
Polar
3z2-r2-0.813
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.586 0.000 0.000
y 0.000 0.586 0.000
z 0.000 0.000 2.056


<r2> (average value of r2) Å2
<r2> 10.907
(<r2>)1/2 3.303