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	hartrees
Energy at 0K	-76.411451
Energy at 298.15K
HF Energy	-76.158623
Nuclear repulsion energy	19.703316

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3425	3425
2	Σ	1971	1971
3	Π	254i	254i
3	Π	254i	254i

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.488
C2	0.000	0.000	0.750
H3	0.000	0.000	-1.568

	C1	C2	H3
C1		1.2378	1.0796
C2	1.2378		2.3173
H3	1.0796	2.3173

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

using model chemistry: QCISD(TQ)/aug-cc-pVDZ

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(TQ)/aug-cc-pVDZ

States and conformations

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