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State	Conformation	minimum conformation	conformer description	state description
1	1	yes	D*H	³Σ_g
2	1	yes	D*H	¹Δ_g

	hartrees
Energy at 0K	-148.997304
Energy at 298.15K	-148.997292
HF Energy	-148.763861
Nuclear repulsion energy	25.986124

Atom	x (Å)	y (Å)	z (Å)
O1	0.000	0.000	0.652
O2	0.000	0.000	-0.652

	O1	O2
O1		1.3033
O2	1.3033

	hartrees
Energy at 0K	-148.944331
Energy at 298.15K	-148.944315
HF Energy	-148.679555
Nuclear repulsion energy	25.645103

All results from a given calculation for O₂ (Oxygen diatomic)

using model chemistry: CISD/3-21G*

States and conformations

State 1 (³Σ_g)

State 2 (¹Δ_g)

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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	O1	O2
O1		1.3206
O2	1.3206

All results from a given calculation for O2 (Oxygen diatomic)

using model chemistry: CISD/3-21G*

States and conformations

State 1 (3Σg)

State 2 (1Δg)

All results from a given calculation for O₂ (Oxygen diatomic)

State 1 (³Σ_g)

State 2 (¹Δ_g)