return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for O2 (Oxygen diatomic)

using model chemistry: CCSD(T)=FULL/SDD

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 CCSD(T)=FULL/SDD
 hartrees
Energy at 0K-149.851591
Energy at 298.15K-149.851573
HF Energy-149.578192
Nuclear repulsion energy26.096537
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 CCSD(T)=FULL/SDD
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 1295 1295        

Unscaled Zero Point Vibrational Energy (zpe) 647.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 647.6 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 CCSD(T)=FULL/SDD
B
1.25210

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/SDD

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.649
O2 0.000 0.000 -0.649

Atom - Atom Distances (Å)
  O1 O2
O11.2975
O21.2975

picture of Oxygen diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability