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	hartrees
Energy at 0K	-75.196106
Energy at 298.15K	-75.194603
HF Energy	-75.196106
Nuclear repulsion energy	19.964987

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3853	3146	101.85
2	Σ	1806	1474	0.08
3	Π	499	407	8.81
3	Π	499	407	8.81

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.481
C2	0.000	0.000	0.740
H3	0.000	0.000	-1.549

	C1	C2	H3
C1		1.2210	1.0671
C2	1.2210		2.2881
H3	1.0671	2.2881

Number	Element	Mulliken
1	C	-0.123
2	C	0.016
3	H	0.107

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

using model chemistry: HF/STO-3G

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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<r²>	13.214
(<r²>)^1/2	3.635

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

using model chemistry: HF/STO-3G

States and conformations

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