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	hartrees
Energy at 0K	-76.555811
Energy at 298.15K
HF Energy	-76.466895
Nuclear repulsion energy	20.176402

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3480	3480	47.45
2	Σ	2106	2106	6.28
3	Π	361	361	0.04
3	Π	361	361	0.04

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.475
C2	0.000	0.000	0.731
H3	0.000	0.000	-1.539

	C1	C2	H3
C1		1.2061	1.0644
C2	1.2061		2.2705
H3	1.0644	2.2705

All results from a given calculation for C₂H (Ethynyl radical)

using model chemistry: B2PLYP=FULLultrafine/6-311G*

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 C2H (Ethynyl radical)

using model chemistry: B2PLYP=FULLultrafine/6-311G*

States and conformations

All results from a given calculation for C₂H (Ethynyl radical)