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	hartrees
Energy at 0K	-263.918286
Energy at 298.15K	-263.917002
HF Energy	-263.302509
Nuclear repulsion energy	122.671070

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2377	2191	0.00
2	Σ_g	816	752	0.00
3	Σ_u	2452	2260	4232.04
4	Σ_u	1729	1594	95.32
5	Π_g	638	588	0.00
5	Π_g	638	588	0.00
6	Π_u	623	575	103.05
6	Π_u	623	575	103.05
7	Π_u	52	48	1.55
7	Π_u	52	48	1.55

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.281
C3	0.000	0.000	-1.281
O4	0.000	0.000	2.435
O5	0.000	0.000	-2.435

	C1	C2	C3	O4	O5
C1		1.2813	1.2813	2.4354	2.4354
C2	1.2813		2.5626	1.1541	3.7167
C3	1.2813	2.5626		3.7167	1.1541
O4	2.4354	1.1541	3.7167		4.8707
O5	2.4354	3.7167	1.1541	4.8707

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: CISD/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: CISD/cc-pVDZ

States and conformations

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