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	hartrees
Energy at 0K	-76.417330
Energy at 298.15K	-76.415610
HF Energy	-76.166121
Nuclear repulsion energy	19.961317

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3437	3309
2	Σ	2017	1942
3	Π	339	326
3	Π	337	325

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.481
C2	0.000	0.000	0.740
H3	0.000	0.000	-1.551

	C1	C2	H3
C1		1.2207	1.0697
C2	1.2207		2.2905
H3	1.0697	2.2905

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

using model chemistry: QCISD(T)/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(T)/6-311G*

States and conformations

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