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	hartrees
Energy at 0K	-2627.110295
Energy at 298.15K	-2627.109965
HF Energy	-2627.110295
Nuclear repulsion energy	303.980174

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	867	838	0.00
2	A₂"	269	260	24.72
3	E'	973	940	74.32
3	E'	973	940	74.33
4	E'	339	327	26.28
4	E'	339	327	26.27

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.613
O3	1.397	-0.807
O4	-1.397	-0.807

	Se1	O2	O3	O4
Se1		1.6135	1.6135	1.6135
O2	1.6135		2.7946	2.7946
O3	1.6135	2.7946		2.7946
O4	1.6135	2.7946	2.7946

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/6-311G**

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	1.174
2	O	-0.391
3	O	-0.391
4	O	-0.391

<r²>	84.488
(<r²>)^1/2	9.192

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

using model chemistry: B3LYP/6-311G**

States and conformations

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