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	hartrees
Energy at 0K	-2624.327170
Energy at 298.15K	-2624.326920
HF Energy	-2624.327170
Nuclear repulsion energy	305.463867

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	942	899	0.00
2	A₂"	279	266	26.35
3	E'	1066	1017	74.77
3	E'	1066	1017	74.78
4	E'	352	336	26.02
4	E'	352	336	26.01

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.606
O3	1.391	-0.803
O4	-1.391	-0.803

	Se1	O2	O3	O4
Se1		1.6057	1.6057	1.6057
O2	1.6057		2.7811	2.7811
O3	1.6057	2.7811		2.7811
O4	1.6057	2.7811	2.7811

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: HSEh1PBE/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>	83.556
(<r²>)^1/2	9.141

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

using model chemistry: HSEh1PBE/6-31G**

States and conformations

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