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: mPW1PW91/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 3Σg
2 1 yes D*H 1Δg

State 1 (3Σg)

Jump to S2C1
Energy calculated at mPW1PW91/TZVP
 hartrees
Energy at 0K-150.340873
Energy at 298.15K-150.340870
HF Energy-150.340873
Nuclear repulsion energy28.318499
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 mPW1PW91/TZVP
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 1695 1617 0.00 19.24 0.30 0.46

Unscaled Zero Point Vibrational Energy (zpe) 847.6 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 808.6 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 mPW1PW91/TZVP
B
1.47375

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.598
O2 0.000 0.000 -0.598

Atom - Atom Distances (Å)
  O1 O2
O11.1959
O21.1959

picture of Oxygen diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP 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 -9.925 0.000 0.000
y 0.000 -9.925 0.000
z 0.000 0.000 -10.630
Traceless
 xyz
x 0.352 0.000 0.000
y 0.000 0.352 0.000
z 0.000 0.000 -0.705
Polar
3z2-r2-1.409
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 0.671 0.000 0.000
y 0.000 0.671 0.000
z 0.000 0.000 2.062


<r2> (average value of r2) Å2
<r2> 12.067
(<r2>)1/2 3.474

State 2 (1Δg)

Jump to S1C1
Energy calculated at mPW1PW91/TZVP
 hartrees
Energy at 0K-150.275695
Energy at 298.15K-150.275692
HF Energy-150.275695
Nuclear repulsion energy28.313313
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 mPW1PW91/TZVP
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 1683 1606 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 841.5 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 802.8 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 mPW1PW91/TZVP
B
1.47321

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.598
O2 0.000 0.000 -0.598

Atom - Atom Distances (Å)
  O1 O2
O11.1962
O21.1962

picture of Oxygen diatomic state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O 0.000      
2 O 0.000      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -9.041 0.000 0.000
y 0.000 -10.934 0.000
z 0.000 0.000 -10.723
Traceless
 xyz
x 1.787 0.000 0.000
y 0.000 -1.052 0.000
z 0.000 0.000 -0.736
Polar
3z2-r2-1.471
x2-y21.892
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.671 0.000 0.000
y 0.000 0.633 0.000
z 0.000 0.000 1.832


<r2> (average value of r2) Å2
<r2> 12.114
(<r2>)1/2 3.481