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	hartrees
Energy at 0K	-76.406560
Energy at 298.15K	-76.404295
HF Energy	-76.156920
Nuclear repulsion energy	19.729972

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3455	3455
2	Σ	1986	1986
3	Π	139	139
3	Π	139	139

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.487
C2	0.000	0.000	0.748
H3	0.000	0.000	-1.566

	C1	C2	H3
C1		1.2357	1.0788
C2	1.2357		2.3145
H3	1.0788	2.3145

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

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

States and conformations

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