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	hartrees
Energy at 0K	-151.815948
Energy at 298.15K
HF Energy	-151.151527
Nuclear repulsion energy	52.589524

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ	3484	3338
2	Σ	2110	2021
3	Σ	1302	1248
4	Π	564	540
4	Π	523	501
5	Π	433	415
5	Π	352i	337i

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.020
C2	0.000	0.000	-1.240
O3	0.000	0.000	1.202
H4	0.000	0.000	-2.299

	C1	C2	O3	H4
C1		1.2598	1.1819	2.3190
C2	1.2598		2.4418	1.0592
O3	1.1819	2.4418		3.5010
H4	2.3190	1.0592	3.5010

All results from a given calculation for HCCO (ketenyl radical)

using model chemistry: CCSD(T)=FULL/aug-cc-pVQZ

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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