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	hartrees
Energy at 0K	-2624.327925
Energy at 298.15K	-2624.327676
HF Energy	-2624.327925
Nuclear repulsion energy	305.783449

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	949	902	0.00
2	A₂"	281	267	26.49
3	E'	1073	1019	75.65
3	E'	1073	1019	75.66
4	E'	353	335	26.24
4	E'	353	335	26.24

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.604
O3	1.389	-0.802
O4	-1.389	-0.802

	Se1	O2	O3	O4
Se1		1.6040	1.6040	1.6040
O2	1.6040		2.7782	2.7782
O3	1.6040	2.7782		2.7782
O4	1.6040	2.7782	2.7782

atom1	atom2	atom3	angle		atom1	atom2	atom3	angle
O2	Se1	O3	120.000		O2	Se1	O4	120.000
O3	Se1	O4	120.000

All results from a given calculation for SeO₃ (selenium trioxide)

using model chemistry: PBE1PBE/6-31G*

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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Number	Element	Mulliken
1	Se	1.330
2	O	-0.443
3	O	-0.443
4	O	-0.443

<r²>	83.420
(<r²>)^1/2	9.133

All results from a given calculation for SeO3 (selenium trioxide)

using model chemistry: PBE1PBE/6-31G*

States and conformations

All results from a given calculation for SeO₃ (selenium trioxide)