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	hartrees
Energy at 0K	-2626.699966
Energy at 298.15K	-2626.699743
HF Energy	-2626.699966
Nuclear repulsion energy	308.497008

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	948	911	0.00
2	A₂"	277	266	28.32
3	E'	1064	1022	85.87
3	E'	1064	1022	85.89
4	E'	359	345	25.77
4	E'	359	345	25.76

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.590
O3	1.377	-0.795
O4	-1.377	-0.795

	Se1	O2	O3	O4
Se1		1.5899	1.5899	1.5899
O2	1.5899		2.7537	2.7537
O3	1.5899	2.7537		2.7537
O4	1.5899	2.7537	2.7537

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/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	1.167
2	O	-0.389
3	O	-0.389
4	O	-0.389

<r²>	82.509
(<r²>)^1/2	9.083

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

using model chemistry: HSEh1PBE/cc-pVTZ

States and conformations

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