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	hartrees
Energy at 0K	-2624.384569
Energy at 298.15K	-2624.384577
HF Energy	-2624.384569
Nuclear repulsion energy	316.742481

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	1071	975	0.00
2	A₂"	335	305	54.11
3	E'	1180	1074	127.95
3	E'	1180	1074	127.95
4	E'	414	377	43.61
4	E'	414	377	43.61

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.548
O3	1.341	-0.774
O4	-1.341	-0.774

	Se1	O2	O3	O4
Se1		1.5485	1.5485	1.5485
O2	1.5485		2.6820	2.6820
O3	1.5485	2.6820		2.6820
O4	1.5485	2.6820	2.6820

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/aug-cc-pVTZ

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	2.161
2	O	-0.720
3	O	-0.720
4	O	-0.720

<r²>	79.886
(<r²>)^1/2	8.938

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

using model chemistry: HF/aug-cc-pVTZ

States and conformations

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