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	hartrees
Energy at 0K	-2626.966627
Energy at 298.15K	-2626.966440
HF Energy	-2626.966627
Nuclear repulsion energy	307.139546

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	963	963	0.00
2	A₂"	293	293	33.46
3	E'	1079	1079	88.09
3	E'	1079	1079	87.69
4	E'	365	365	33.20
4	E'	365	365	33.18

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.597
O3	1.383	-0.798
O4	-1.383	-0.798

	Se1	O2	O3	O4
Se1		1.5969	1.5969	1.5969
O2	1.5969		2.7659	2.7659
O3	1.5969	2.7659		2.7659
O4	1.5969	2.7659	2.7659

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: M06-2X/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	1.354
2	O	-0.451
3	O	-0.451
4	O	-0.451

<r²>	83.176
(<r²>)^1/2	9.120

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

using model chemistry: M06-2X/cc-pVDZ

States and conformations

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