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	hartrees
Energy at 0K	-2624.826624
Energy at 298.15K	-2624.826436
HF Energy	-2624.826624
Nuclear repulsion energy	307.419787

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	990	937	0.00
2	A₂"	291	276	31.78
3	E'	1112	1053	84.64
3	E'	1112	1053	84.08
4	E'	367	347	31.21
4	E'	367	347	31.19

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.595
O3	1.382	-0.798
O4	-1.382	-0.798

	Se1	O2	O3	O4
Se1		1.5954	1.5954	1.5954
O2	1.5954		2.7634	2.7634
O3	1.5954	2.7634		2.7634
O4	1.5954	2.7634	2.7634

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: M06-2X/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	1.439
2	O	-0.480
3	O	-0.480
4	O	-0.480

<r²>	82.989
(<r²>)^1/2	9.110

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

using model chemistry: M06-2X/6-31G*

States and conformations

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