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	hartrees
Energy at 0K	-76.468488
Energy at 298.15K	-76.466805
HF Energy	-76.177332
Nuclear repulsion energy	20.063289

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3455	3277
2	Σ	2032	1928
3	Π	352	334
3	Π	352	334

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.479
C2	0.000	0.000	0.736
H3	0.000	0.000	-1.543

	C1	C2	H3
C1		1.2143	1.0643
C2	1.2143		2.2786
H3	1.0643	2.2786

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

using model chemistry: QCISD(T)/cc-pVTZ

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)/cc-pVTZ

States and conformations

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