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	hartrees
Energy at 0K	-76.548026
Energy at 298.15K	-76.546467
HF Energy	-76.182462
Nuclear repulsion energy	20.161819

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3464	3464
2	Σ	2049	2049
3	Π	415	415
3	Π	415	415

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.476
C2	0.000	0.000	0.732
H3	0.000	0.000	-1.538

	C1	C2	H3
C1		1.2077	1.0621
C2	1.2077		2.2697
H3	1.0621	2.2697

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

using model chemistry: QCISD(T)=FULL/aug-cc-pVQZ

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)=FULL/aug-cc-pVQZ

States and conformations

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