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	hartrees
Energy at 0K	-76.414724
Energy at 298.15K	-76.412671
HF Energy	-76.156039
Nuclear repulsion energy	19.906314

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3495	3495
2	Σ	2008	2008
3	Π	208	208
3	Π	208	208

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.484
C2	0.000	0.000	0.742
H3	0.000	0.000	-1.549

	C1	C2	H3
C1		1.2258	1.0654
C2	1.2258		2.2912
H3	1.0654	2.2912

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

using model chemistry: QCISD(TQ)=FULL/6-31+G**

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/6-31+G**

States and conformations

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