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	hartrees
Energy at 0K	-2612.383940
Energy at 298.15K	-2612.383519
HF Energy	-2611.837163
Nuclear repulsion energy	298.392284

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁'	868	835	0.00
2	A₂"	251	241	19.89
3	E'	999	960	26.13
3	E'	999	960	26.13
4	E'	310	298	23.87
4	E'	310	298	23.87

Atom	x (Å)	y (Å)
Se1	0.000	0.000
O2	0.000	1.644
O3	1.423	-0.822
O4	-1.423	-0.822

	Se1	O2	O3	O4
Se1		1.6437	1.6437	1.6437
O2	1.6437		2.8470	2.8470
O3	1.6437	2.8470		2.8470
O4	1.6437	2.8470	2.8470

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: QCISD/3-21G*

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: QCISD/3-21G*

States and conformations

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