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	hartrees
Energy at 0K	-55.788943
Energy at 298.15K	-55.788001
HF Energy	-55.788943
Nuclear repulsion energy	53.519048

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	708	638	0.00
2	A₂"	184	166	43.87
3	E'	667	601	21.30
3	E'	667	601	21.30
4	E'	249	224	31.57
4	E'	249	224	31.57

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.684
O3	1.459	-0.842
O4	-1.459	-0.842

	Se1	O2	O3	O4
Se1		1.6844	1.6844	1.6844
O2	1.6844		2.9175	2.9175
O3	1.6844	2.9175		2.9175
O4	1.6844	2.9175	2.9175

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: HF/CEP-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	1.472
2	O	-0.491
3	O	-0.491
4	O	-0.491

<r²>	73.013
(<r²>)^1/2	8.545

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

using model chemistry: HF/CEP-31G

States and conformations

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