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	hartrees
Energy at 0K	-151.832795
Energy at 298.15K	-151.829456
HF Energy	-151.135600
Nuclear repulsion energy	63.931839

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)	Raman Act (Å⁴/u)	Dep P	Dep U
1	Σ_g	2345	2209	0.00	100.25	0.45	0.62
2	Σ_g	1021	962	0.00	277.57	0.36	0.53
3	Σ_u	1740	1640	142.35	0.00	0.00	0.00
4	Π_g	408	384	0.00	5.25	0.75	0.86
4	Π_g	408	384	0.00	5.25	0.75	0.86
5	Π_u	210	197	25.62	0.00	0.00	0.00
5	Π_u	210	197	25.62	0.00	0.00	0.00

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.648
C2	0.000	0.000	-0.648
C3	0.000	0.000	1.961
C4	0.000	0.000	-1.961

	C1	C2	C3	C4
C1		1.2959	1.3127	2.6086
C2	1.2959		2.6086	1.3127
C3	1.3127	2.6086		3.9214
C4	2.6086	1.3127	3.9214

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

using model chemistry: G3MP2

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

using model chemistry: G3MP2

States and conformations

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