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	hartrees
Energy at 0K	-2627.250879
Energy at 298.15K	-2627.250583
HF Energy	-2627.250879
Nuclear repulsion energy	305.897154

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	904	875	0.00
2	A₂"	262	254	26.30
3	E'	1013	980	86.02
3	E'	1013	980	86.05
4	E'	346	334	23.86
4	E'	346	334	23.85

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.603
O3	1.389	-0.802
O4	-1.389	-0.802

	Se1	O2	O3	O4
Se1		1.6034	1.6034	1.6034
O2	1.6034		2.7771	2.7771
O3	1.6034	2.7771		2.7771
O4	1.6034	2.7771	2.7771

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: B3LYP/aug-cc-pVTZ

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	2.056
2	O	-0.685
3	O	-0.685
4	O	-0.685

<r²>	83.929
(<r²>)^1/2	9.161

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

using model chemistry: B3LYP/aug-cc-pVTZ

States and conformations

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