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	hartrees
Energy at 0K	-76.085598
Energy at 298.15K
HF Energy	-76.028420
Nuclear repulsion energy	20.104244

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3504	3504	50.49
2	Σ	2130	2130	6.47
3	Π	550	550	8.46
3	Π	550	550	8.46

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.478
C2	0.000	0.000	0.734
H3	0.000	0.000	-1.539

	C1	C2	H3
C1		1.2121	1.0617
C2	1.2121		2.2738
H3	1.0617	2.2738

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

using model chemistry: B2PLYP=FULLultrafine/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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All results from a given calculation for C2H (Ethynyl radical)

using model chemistry: B2PLYP=FULLultrafine/3-21G

States and conformations

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