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State	Conformation	minimum conformation	conformer description	state description
1	1	yes	C*V	¹Σ
2	1	yes	C*V	³Π

	hartrees
Energy at 0K	-113.187905
Energy at 298.15K	-113.186653
HF Energy	-112.788366
Nuclear repulsion energy	22.443834

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.647
O2	0.000	0.000	0.485

	C1	O2
C1		1.1314
O2	1.1314

	hartrees
Energy at 0K	-112.964936
Energy at 298.15K	-112.963681
HF Energy	-112.598113
Nuclear repulsion energy	21.070332

All results from a given calculation for CO (Carbon monoxide)

using model chemistry: CCSD(T)/cc-pVQZ

States and conformations

State 1 (¹Σ)

State 2 (³Π)

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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	C1	O2
C1		1.2052
O2	1.2052

All results from a given calculation for CO (Carbon monoxide)

using model chemistry: CCSD(T)/cc-pVQZ

States and conformations

State 1 (1Σ)

State 2 (3Π)

State 1 (¹Σ)

State 2 (³Π)