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: B1B95/6-31G

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 B1B95/6-31G
 hartrees
Energy at 0K-150.225412
Energy at 298.15K-150.225405
HF Energy-150.225412
Nuclear repulsion energy27.281917
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 B1B95/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 1496 1427 0.00 14.46 0.36 0.53

Unscaled Zero Point Vibrational Energy (zpe) 747.9 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 713.3 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 B1B95/6-31G
B
1.36783

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.621
O2 0.000 0.000 -0.621

Atom - Atom Distances (Å)
  O1 O2
O11.2414
O21.2414

picture of Oxygen diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G 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 -9.891 0.000 0.000
y 0.000 -9.891 0.000
z 0.000 0.000 -10.907
Traceless
 xyz
x 0.508 0.000 0.000
y 0.000 0.508 0.000
z 0.000 0.000 -1.016
Polar
3z2-r2-2.032
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 0.392 0.000 0.000
y 0.000 0.392 0.000
z 0.000 0.000 1.964


<r2> (average value of r2) Å2
<r2> 12.553
(<r2>)1/2 3.543

State 2 (1Δg)

Jump to S1C1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-150.161680
Energy at 298.15K-150.161671
HF Energy-150.161680
Nuclear repulsion energy27.237251
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 B1B95/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 1477 1409 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 738.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 704.4 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 B1B95/6-31G
B
1.36335

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

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
O11.2434
O21.2434

picture of Oxygen diatomic state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G 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 -10.816 0.000 0.000
y 0.000 -9.043 0.000
z 0.000 0.000 -10.947
Traceless
 xyz
x -0.821 0.000 0.000
y 0.000 1.839 0.000
z 0.000 0.000 -1.017
Polar
3z2-r2-2.035
x2-y2-1.774
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.239 0.000 0.000
y 0.000 0.468 0.000
z 0.000 0.000 1.770


<r2> (average value of r2) Å2
<r2> 12.598
(<r2>)1/2 3.549