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	hartrees
Energy at 0K	-2596.682298
Energy at 298.15K	-2596.681018
HF Energy	-2596.682298
Nuclear repulsion energy	282.773748

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	706	622	0.00
2	A₂"	79	70	6.32
3	E'	810	714	5.23
3	E'	810	714	5.23
4	E'	206	181	7.44
4	E'	206	181	7.44

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.734
O3	1.502	-0.867
O4	-1.502	-0.867

	Se1	O2	O3	O4
Se1		1.7345	1.7345	1.7345
O2	1.7345		3.0042	3.0042
O3	1.7345	3.0042		3.0042
O4	1.7345	3.0042	3.0042

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: PBE1PBE/STO-3G

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	0.779
2	O	-0.260
3	O	-0.260
4	O	-0.260

<r²>	92.141
(<r²>)^1/2	9.599

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

using model chemistry: PBE1PBE/STO-3G

States and conformations

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