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	hartrees
Energy at 0K	-2614.621223
Energy at 298.15K	-2614.620852
HF Energy	-2614.621223
Nuclear repulsion energy	300.115673

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	909	872	0.00
2	A₂"	254	243	20.72
3	E'	1049	1006	42.85
3	E'	1049	1006	42.85
4	E'	318	305	23.01
4	E'	318	305	23.01

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.634
O3	1.415	-0.817
O4	-1.415	-0.817

	Se1	O2	O3	O4
Se1		1.6343	1.6343	1.6343
O2	1.6343		2.8306	2.8306
O3	1.6343	2.8306		2.8306
O4	1.6343	2.8306	2.8306

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: B3PW91/3-21G*

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	1.087
2	O	-0.362
3	O	-0.362
4	O	-0.362

<r²>	85.481
(<r²>)^1/2	9.246

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

using model chemistry: B3PW91/3-21G*

States and conformations

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