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	hartrees
Energy at 0K	-262.323563
Energy at 298.15K	-262.322418
HF Energy	-261.802855
Nuclear repulsion energy	120.931974

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2165	2099	0.00
2	Σ_g	773	749	0.00
3	Σ_u	2373	2300	2432.57
4	Σ_u	1571	1523	120.54
5	Π_g	625	605	0.00
5	Π_g	625	605	0.00
6	Π_u	711	689	101.21
6	Π_u	711	689	101.21
7	Π_u	76	74	0.36
7	Π_u	76	74	0.36

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.274
C3	0.000	0.000	-1.274
O4	0.000	0.000	2.468
O5	0.000	0.000	-2.468

	C1	C2	C3	O4	O5
C1		1.2740	1.2740	2.4684	2.4684
C2	1.2740		2.5481	1.1943	3.7424
C3	1.2740	2.5481		3.7424	1.1943
O4	2.4684	1.1943	3.7424		4.9368
O5	2.4684	3.7424	1.1943	4.9368

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/3-21G

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/3-21G

States and conformations

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