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	hartrees
Energy at 0K	-11.490232
Energy at 298.15K	-11.489143
HF Energy	-11.366023
Nuclear repulsion energy	9.939322

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3480	3396	54.77
2	Σ	2156	2105	1.45
3	Π	809	790	32.56
3	Π	809	790	32.56

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.417
C2	0.000	0.000	0.788
H3	0.000	0.000	-1.485

	C1	C2	H3
C1		1.2048	1.0686
C2	1.2048		2.2735
H3	1.0686	2.2735

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

using model chemistry: MP2/CEP-121G

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: MP2/CEP-121G

States and conformations

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