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	hartrees
Energy at 0K	-264.046919
Energy at 298.15K	-264.045689
HF Energy	-263.278328
Nuclear repulsion energy	121.253401

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	2225	2135
2	Σ_g	773	741
3	Σ_u	2383	2286
4	Σ_u	1610	1545
5	Π_g	565	542
5	Π_g	565	542
6	Π_u	560	538
6	Π_u	560	538
7	Π_u	119	114
7	Π_u	119	114

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.284
C3	0.000	0.000	-1.284
O4	0.000	0.000	2.463
O5	0.000	0.000	-2.463

	C1	C2	C3	O4	O5
C1		1.2836	1.2836	2.4629	2.4629
C2	1.2836		2.5671	1.1793	3.7465
C3	1.2836	2.5671		3.7465	1.1793
O4	2.4629	1.1793	3.7465		4.9258
O5	2.4629	3.7465	1.1793	4.9258

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)/6-31+G**

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)/6-31+G**

States and conformations

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