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	hartrees
Energy at 0K	-2596.518244
Energy at 298.15K	-2596.516872
HF Energy	-2596.518244
Nuclear repulsion energy	278.652610

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	678	620	0.00
2	A₂"	77	70	3.86
3	E'	766	700	5.53
3	E'	766	700	5.52
4	E'	192	175	6.41
4	E'	192	175	6.41

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.760
O3	1.524	-0.880
O4	-1.524	-0.880

	Se1	O2	O3	O4
Se1		1.7601	1.7601	1.7601
O2	1.7601		3.0487	3.0487
O3	1.7601	3.0487		3.0487
O4	1.7601	3.0487	3.0487

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: PBEPBE/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	0.678
2	O	-0.226
3	O	-0.226
4	O	-0.226

<r²>	94.065
(<r²>)^1/2	9.699

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

using model chemistry: PBEPBE/STO-3G

States and conformations

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