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	hartrees
Energy at 0K	-264.311345
Energy at 298.15K
HF Energy	-263.371589
Nuclear repulsion energy	122.098822

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	2230	2115
2	Σ_g	769	729
3	Σ_u	2375	2253
4	Σ_u	1613	1531
5	Π_g	582	552
5	Π_g	582	552
6	Π_u	535	507
6	Π_u	535	507
7	Π_u	26i	24i
7	Π_u	26i	24i

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.279
C3	0.000	0.000	-1.279
O4	0.000	0.000	2.446
O5	0.000	0.000	-2.446

	C1	C2	C3	O4	O5
C1		1.2787	1.2787	2.4458	2.4458
C2	1.2787		2.5574	1.1671	3.7244
C3	1.2787	2.5574		3.7244	1.1671
O4	2.4458	1.1671	3.7244		4.8915
O5	2.4458	3.7244	1.1671	4.8915

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)/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: QCISD(T)/cc-pVTZ

States and conformations

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