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	hartrees
Energy at 0K	-150.307597
Energy at 298.15K
HF Energy	-150.307597
Nuclear repulsion energy	64.172686

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2364	2144	0.00
2	Σ_g	1019	924	0.00
3	Σ_u	1501	1361	429.80
4	Π_g	552	500	0.00
4	Π_g	552	500	0.00
5	Π_u	207	188	6.36
5	Π_u	207	188	6.36

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.634
C2	0.000	0.000	-0.634
C3	0.000	0.000	1.931
C4	0.000	0.000	-1.931

	C1	C2	C3	C4
C1		1.2680	1.2974	2.5655
C2	1.2680		2.5655	1.2974
C3	1.2974	2.5655		3.8629
C4	2.5655	1.2974	3.8629

Number	Element	Mulliken
1	C	-0.316
2	C	-0.316
3	C	0.316
4	C	0.316

All results from a given calculation for C₄ (Carbon tetramer)

using model chemistry: ROHF/3-21G

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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<r²>	65.476
(<r²>)^1/2	8.092

All results from a given calculation for C4 (Carbon tetramer)

using model chemistry: ROHF/3-21G

States and conformations

All results from a given calculation for C₄ (Carbon tetramer)