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	hartrees
Energy at 0K	-2627.009595
Energy at 298.15K	-2627.009402
HF Energy	-2627.009595
Nuclear repulsion energy	306.473893

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	958	958	0.00
2	A₂"	294	294	31.31
3	E'	1069	1069	94.59
3	E'	1069	1069	94.02
4	E'	361	361	29.01
4	E'	361	361	29.07

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.600
O3	1.386	-0.800
O4	-1.386	-0.800

	Se1	O2	O3	O4
Se1		1.6004	1.6004	1.6004
O2	1.6004		2.7719	2.7719
O3	1.6004	2.7719		2.7719
O4	1.6004	2.7719	2.7719

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/aug-cc-pVDZ

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	2.162
2	O	-0.721
3	O	-0.721
4	O	-0.721

<r²>	83.818
(<r²>)^1/2	9.155

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

using model chemistry: M06-2X/aug-cc-pVDZ

States and conformations

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