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	hartrees
Energy at 0K	-76.431440
Energy at 298.15K	-76.430350
HF Energy	-76.168010
Nuclear repulsion energy	20.534084

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3574	3574	55.23
2	Σ	2390	2390	7.31
3	Π	810	810	17.70
3	Π	810	810	17.70

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.463
C2	0.000	0.000	0.718
H3	0.000	0.000	-1.526

	C1	C2	H3
C1		1.1810	1.0626
C2	1.1810		2.2436
H3	1.0626	2.2436

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

using model chemistry: MP3=FULL/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: MP3=FULL/6-311G**

States and conformations

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