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	hartrees
Energy at 0K	-76.406017
Energy at 298.15K	-76.404450
HF Energy	-76.166254
Nuclear repulsion energy	20.025969

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3458	3310	45.45
2	Σ	2042	1955	4.81
3	Π	412	395	7.49
3	Π	412	395	7.49

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.479
C2	0.000	0.000	0.737
H3	0.000	0.000	-1.547

	C1	C2	H3
C1		1.2162	1.0681
C2	1.2162		2.2844
H3	1.0681	2.2844

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

using model chemistry: QCISD/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: QCISD/6-311G*

States and conformations

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