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	hartrees
Energy at 0K	-262.373948
Energy at 298.15K	-262.372789
HF Energy	-261.791998
Nuclear repulsion energy	119.212039

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	Σ_g	1998	1937
2	Σ_g	715	693
3	Σ_u	2347	2276
4	Σ_u	1425	1382
5	Π_g	593	575
5	Π_g	593	575
6	Π_u	685	664
6	Π_u	685	664
7	Π_u	97	94
7	Π_u	97	94

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.282
C3	0.000	0.000	-1.282
O4	0.000	0.000	2.504
O5	0.000	0.000	-2.504

	C1	C2	C3	O4	O5
C1		1.2824	1.2824	2.5038	2.5038
C2	1.2824		2.5647	1.2214	3.7861
C3	1.2824	2.5647		3.7861	1.2214
O4	2.5038	1.2214	3.7861		5.0076
O5	2.5038	3.7861	1.2214	5.0076

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: MP4/3-21G

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: MP4/3-21G

States and conformations

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