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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	-21.334909
Energy at 298.15K	-21.333656
HF Energy	-21.118000
Nuclear repulsion energy	10.668640

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.714
O2	0.000	0.000	0.476

	C1	O2
C1		1.1904
O2	1.1904

	hartrees
Energy at 0K	-21.106562
Energy at 298.15K	-21.105308
HF Energy	-20.959171
Nuclear repulsion energy	10.470333

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

using model chemistry: MP2/CEP-121G

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		1.2130
O2	1.2130

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

using model chemistry: MP2/CEP-121G

States and conformations

State 1 (1Σ)

State 2 (3Π)

State 1 (¹Σ)

State 2 (³Π)