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Experimental data for O2 (Oxygen diatomic)

22 02 02 11 45
Other names
Dioxygen; Molecular oxygen; Oxygen; Oxygen molecule; Oxygen-16;
INChI INChIKey SMILES IUPAC name
InChI=1S/O2/c1-2 MYMOFIZGZYHOMD-UHFFFAOYSA-N O=O Dioxygen
State Conformation
3Σg D*H
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation 0.00 0.00 kJ mol-1 CODATA
Hfg(0K) enthalpy of formation 0.00 0.00 kJ mol-1 CODATA
Entropy (298.15K) entropy 205.15 0.00 J K-1 mol-1 CODATA
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 8.68 0.00 kJ mol-1 CODATA
Heat Capacity (298.15K) heat capacity 29.38   J K-1 mol-1 Gurvich
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 Σg 1556 1580 1979HUB/HER      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
1580.161 11.95127 0.0458489 1.44562 0.0159305 787.3797 2007Iri:389
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