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	hartrees
Energy at 0K	-56.312872
Energy at 298.15K	-56.312324
HF Energy	-55.794206
Nuclear repulsion energy	52.733169

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	830	810	0.00
2	A₂"	197	192	20.17
3	E'	1073	1047	171.12
3	E'	1073	1047	171.12
4	E'	277	270	14.38
4	E'	277	270	14.38

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.710
O3	1.480	-0.855
O4	-1.480	-0.855

	Se1	O2	O3	O4
Se1		1.7095	1.7095	1.7095
O2	1.7095		2.9609	2.9609
O3	1.7095	2.9609		2.9609
O4	1.7095	2.9609	2.9609

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: MP2/CEP-121G

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

using model chemistry: MP2/CEP-121G

States and conformations

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