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	hartrees
Energy at 0K	-2626.560211
Energy at 298.15K	-2626.559935
HF Energy	-2626.560211
Nuclear repulsion energy	304.386990

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	907	873	0.00
2	A₂"	278	268	26.01
3	E'	1018	980	86.73
3	E'	1018	980	86.73
4	E'	344	331	23.77
4	E'	344	331	23.76

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.611
O3	1.395	-0.806
O4	-1.395	-0.806

	Se1	O2	O3	O4
Se1		1.6113	1.6113	1.6113
O2	1.6113		2.7909	2.7909
O3	1.6113	2.7909		2.7909
O4	1.6113	2.7909	2.7909

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: HSEh1PBE/aug-cc-pVDZ

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	2.092
2	O	-0.697
3	O	-0.697
4	O	-0.697

<r²>	84.486
(<r²>)^1/2	9.192

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

using model chemistry: HSEh1PBE/aug-cc-pVDZ

States and conformations

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