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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	-21.123140
Energy at 298.15K	-21.121888
HF Energy	-21.123140
Nuclear repulsion energy	11.135607

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.684
O2	0.000	0.000	0.456

	C1	O2
C1		1.1405
O2	1.1405

Number	Element	Mulliken	CHELPG	AIM	ESP
1	C	0.140
2	O	-0.140

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

using model chemistry: HF/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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You are here: Calculated > Energy > Optimized > Energy

	hartrees
Energy at 0K	-20.961810
Energy at 298.15K	-20.960546
HF Energy	-20.961810
Nuclear repulsion energy	10.051560

<r²>	10.059
(<r²>)^1/2	3.172

	C1	O2
C1		1.2635
O2	1.2635

<r²>	10.493
(<r²>)^1/2	3.239

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

using model chemistry: HF/CEP-121G

States and conformations

State 1 (1Σ)

State 2 (3Π)

State 1 (¹Σ)

State 2 (³Π)