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	hartrees
Energy at 0K	-264.430512
Energy at 298.15K	-264.429056
HF Energy	-263.371704
Nuclear repulsion energy	122.571394

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	2407	2407
2	Σ_g	893	893
3	Σ_u	2389	2389
4	Σ_u	1634	1634
5	Π_g	596	596
5	Π_g	596	596
6	Π_u	568	568
6	Π_u	568	568
7	Π_u	32	32
7	Π_u	32	32

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.276
C3	0.000	0.000	-1.276
O4	0.000	0.000	2.437
O5	0.000	0.000	-2.437

	C1	C2	C3	O4	O5
C1		1.2760	1.2760	2.4369	2.4369
C2	1.2760		2.5519	1.1610	3.7129
C3	1.2760	2.5519		3.7129	1.1610
O4	2.4369	1.1610	3.7129		4.8739
O5	2.4369	3.7129	1.1610	4.8739

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: CCSD(T)=FULL/6-311+G(3df,2p)

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: CCSD(T)=FULL/6-311+G(3df,2p)

States and conformations

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