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	hartrees
Energy at 0K	-76.383485
Energy at 298.15K	-76.382269
HF Energy	-76.166128
Nuclear repulsion energy	20.299930

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3521	3258	46.52
2	Σ	2189	2026	4.96
3	Π	660	611	21.67
3	Π	660	611	21.67

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.471
C2	0.000	0.000	0.727
H3	0.000	0.000	-1.535

	C1	C2	H3
C1		1.1972	1.0642
C2	1.1972		2.2614
H3	1.0642	2.2614

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

using model chemistry: CISD/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: CISD/6-311G*

States and conformations

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