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State	Conformation	minimum conformation	conformer description	state description
1	1	yes	D*H	¹Σ_g
1	2	no	C2V	¹A₁

	hartrees
Energy at 0K	-16.562547
Energy at 298.15K
HF Energy	-16.220253
Nuclear repulsion energy	16.118256

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	1173	1118	0.00
2	Σ_u	2106	2006	466.14
3	Π_u	323	307	21.36
3	Π_u	323	307	21.36

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.313
C3	0.000	0.000	-1.313

	C1	C2	C3
C1		1.3132	1.3132
C2	1.3132		2.6265
C3	1.3132	2.6265

All results from a given calculation for C₃ (carbon trimer)

using model chemistry: MP2/CEP-121G*

States and conformations

Conformer 1 (D*H)

Conformer 2 (C2V)

	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	C2	C3
C1		1.3134	1.3134
C2	1.3134		2.6268
C3	1.3134	2.6268

All results from a given calculation for C3 (carbon trimer)

using model chemistry: MP2/CEP-121G*

States and conformations

Conformer 1 (D*H)

Conformer 2 (C2V)

All results from a given calculation for C₃ (carbon trimer)