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	hartrees
Energy at 0K	-75.862832
Energy at 298.15K	-75.861739
HF Energy	-75.729925
Nuclear repulsion energy	20.450717

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3559	3397	55.06
2	Σ	2334	2228	4.87
3	Π	808	772	32.61
3	Π	808	772	32.61

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.466
C2	0.000	0.000	0.721
H3	0.000	0.000	-1.528

	C1	C2	H3
C1		1.1872	1.0612
C2	1.1872		2.2484
H3	1.0612	2.2484

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

using model chemistry: MP2/3-21G

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: MP2/3-21G

States and conformations

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