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	hartrees
Energy at 0K	-262.337853
Energy at 298.15K	-262.336652
HF Energy	-261.800128
Nuclear repulsion energy	120.428097

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)	Raman Act (Å⁴/u)	Dep P	Dep U
1	Σ_g	2167	2062	0.00	62.94	0.29	0.46
2	Σ_g	762	725	0.00	65.51	0.30	0.46
3	Σ_u	2457	2337	1842.37	0.00	0.00	0.00
4	Σ_u	1556	1481	55.59	0.00	0.00	0.00
5	Π_g	616	586	0.00	0.01	0.75	0.86
5	Π_g	616	586	0.00	0.01	0.75	0.86
6	Π_u	689	656	61.46	0.00	0.00	0.00
6	Π_u	689	656	61.46	0.00	0.00	0.00
7	Π_u	72	68	0.41	0.00	0.00	0.00
7	Π_u	72	68	0.41	0.00	0.00	0.00

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	2.479
O5	0.000	0.000	-2.479

	C1	C2	C3	O4	O5
C1		1.2759	1.2759	2.4785	2.4785
C2	1.2759		2.5518	1.2027	3.7544
C3	1.2759	2.5518		3.7544	1.2027
O4	2.4785	1.2027	3.7544		4.9571
O5	2.4785	3.7544	1.2027	4.9571

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: MP2/3-21G*

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: MP2/3-21G*

States and conformations

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