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=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=FULL/SDD
 hartrees
Energy at 0K-149.845044
Energy at 298.15K-149.845030
HF Energy-149.580645
Nuclear repulsion energy26.325952
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=FULL/SDD
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σg 1359 1359 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 679.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 679.5 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=FULL/SDD
B
1.27365

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.643
O2 0.000 0.000 -0.643

Atom - Atom Distances (Å)
  O1 O2
O11.2865
O21.2865

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