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	hartrees
Energy at 0K	-264.433011
Energy at 298.15K	-264.431565
HF Energy	-263.371332
Nuclear repulsion energy	122.490112

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	2398	2398
2	Σ_g	891	891
3	Σ_u	2378	2378
4	Σ_u	1625	1625
5	Π_g	593	593
5	Π_g	593	593
6	Π_u	565	565
6	Π_u	565	565
7	Π_u	36	36
7	Π_u	36	36

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	2.438
O5	0.000	0.000	-2.438

	C1	C2	C3	O4	O5
C1		1.2763	1.2763	2.4385	2.4385
C2	1.2763		2.5525	1.1622	3.7148
C3	1.2763	2.5525		3.7148	1.1622
O4	2.4385	1.1622	3.7148		4.8770
O5	2.4385	3.7148	1.1622	4.8770

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

States and conformations

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