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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	-113.911325
Energy at 298.15K
HF Energy	-113.911325
Nuclear repulsion energy	36.739285

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	1251	1195	0.00
2	Σ_u	2168	2070	888.75
3	Π_u	148	142	10.93
3	Π_u	148	142	10.93

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.296
C3	0.000	0.000	-1.296

	C1	C2	C3
C1		1.2963	1.2963
C2	1.2963		2.5926
C3	1.2963	2.5926

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

using model chemistry: HSEh1PBE/6-31+G**

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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Number	Element	Mulliken
1	C	1.662
2	C	-0.831
3	C	-0.831

<r²>	31.799
(<r²>)^1/2	5.639

Number	Element	Mulliken
1	C	1.662
2	C	-0.831
3	C	-0.831

<r²>	31.799
(<r²>)^1/2	5.639

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

using model chemistry: HSEh1PBE/6-31+G**

States and conformations

Conformer 1 (D*H)

Conformer 2 (C2V)

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