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	hartrees
Energy at 0K	-76.296981
Energy at 298.15K	-76.295481
HF Energy	-76.128656
Nuclear repulsion energy	19.742609

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3444	3319	36.30
2	Σ	1992	1919	3.50
3	Π	450	434	18.28
3	Π	450	434	18.28

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.488
C2	0.000	0.000	0.748
H3	0.000	0.000	-1.561

	C1	C2	H3
C1		1.2365	1.0724
C2	1.2365		2.3089
H3	1.0724	2.3089

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

using model chemistry: QCISD/6-31G

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: QCISD/6-31G

States and conformations

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