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	hartrees
Energy at 0K	-76.449288
Energy at 298.15K	-76.448205
HF Energy	-76.175630
Nuclear repulsion energy	20.710521

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ	3594	3413	59.06
2	Σ	2535	2406	10.17
3	Π	821	779	13.85
3	Π	821	779	13.85

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	-0.459
C2	0.000	0.000	0.711
H3	0.000	0.000	-1.514

	C1	C2	H3
C1		1.1707	1.0545
C2	1.1707		2.2252
H3	1.0545	2.2252

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

using model chemistry: MP2=FULL/cc-pVTZ

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=FULL/cc-pVTZ

States and conformations

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