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	hartrees
Energy at 0K	-264.122429
Energy at 298.15K
HF Energy	-263.377407
Nuclear repulsion energy	123.966869

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2394	2226	0.00
2	Σ_g	818	760	0.00
3	Σ_u	2451	2279	4648.08
4	Σ_u	1743	1620	71.29
5	Π_g	643	598	0.00
5	Π_g	643	598	0.00
6	Π_u	616	573	86.26
6	Π_u	616	573	86.26
7	Π_u	50i	46i	1.04
7	Π_u	50i	46i	1.04

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.266
C3	0.000	0.000	-1.266
O4	0.000	0.000	2.410
O5	0.000	0.000	-2.410

	C1	C2	C3	O4	O5
C1		1.2661	1.2661	2.4097	2.4097
C2	1.2661		2.5322	1.1436	3.6758
C3	1.2661	2.5322		3.6758	1.1436
O4	2.4097	1.1436	3.6758		4.8194
O5	2.4097	3.6758	1.1436	4.8194

atom1	atom2	atom3	angle		atom1	atom2	atom3	angle
C1	C2	O4	180.000		C1	C3	O5	180.000
C2	C1	C3	180.000

All results from a given calculation for C₃O₂ (Carbon suboxide)

using model chemistry: CISD/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 C3O2 (Carbon suboxide)

using model chemistry: CISD/cc-pVTZ

States and conformations

All results from a given calculation for C₃O₂ (Carbon suboxide)