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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	-113.766365
Energy at 298.15K
HF Energy	-113.363366
Nuclear repulsion energy	36.824019

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	1251	1185	0.00
2	Σ_u	2157	2043	785.64
3	Π_u	131	124	14.94
3	Π_u	131	124	14.94

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.293
C3	0.000	0.000	-1.293

	C1	C2	C3
C1		1.2933	1.2933
C2	1.2933		2.5867
C3	1.2933	2.5867

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

using model chemistry: QCISD/6-31G(2df,p)

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

using model chemistry: QCISD/6-31G(2df,p)

States and conformations

Conformer 1 (D*H)

Conformer 2 (C2V)

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