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	hartrees
Energy at 0K	-264.076671
Energy at 298.15K
HF Energy	-263.310978
Nuclear repulsion energy	121.336389

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2226	2226	0.00
2	Σ_g	773	773	0.00
3	Σ_u	2341	2341	3749.77
4	Σ_u	1620	1620	122.32
5	Π_g	601	601	0.00
5	Π_g	601	601	0.00
6	Π_u	536	536	49.86
6	Π_u	536	536	49.86
7	Π_u	117i	117i	1.15
7	Π_u	117i	117i	1.15

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.291
C3	0.000	0.000	-1.291
O4	0.000	0.000	2.462
O5	0.000	0.000	-2.462

	C1	C2	C3	O4	O5
C1		1.2905	1.2905	2.4617	2.4617
C2	1.2905		2.5811	1.1711	3.7522
C3	1.2905	2.5811		3.7522	1.1711
O4	2.4617	1.1711	3.7522		4.9233
O5	2.4617	3.7522	1.1711	4.9233

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/daug-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: QCISD/daug-cc-pVDZ

States and conformations

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