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	hartrees
Energy at 0K	-264.110640
Energy at 298.15K
HF Energy	-263.306015
Nuclear repulsion energy	120.704883

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	2186	2137
2	Σ_g	756	739
3	Σ_u	2341	2289
4	Σ_u	1580	1545
5	Π_g	573	561
5	Π_g	573	561
6	Π_u	496	485
6	Π_u	496	485
7	Π_u	129i	126i
7	Π_u	129i	126i

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.296
C3	0.000	0.000	-1.296
O4	0.000	0.000	2.474
O5	0.000	0.000	-2.474

	C1	C2	C3	O4	O5
C1		1.2956	1.2956	2.4742	2.4742
C2	1.2956		2.5911	1.1786	3.7697
C3	1.2956	2.5911		3.7697	1.1786
O4	2.4742	1.1786	3.7697		4.9484
O5	2.4742	3.7697	1.1786	4.9484

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: QCISD(T)/aug-cc-pVDZ

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: QCISD(T)/aug-cc-pVDZ

States and conformations

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