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

using model chemistry: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-2611.960862
Energy at 298.15K-2611.960552
HF Energy-2611.556645
Nuclear repulsion energy299.361400
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CID/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1' 923 860 0.00      
2 A2" 212 197 40.70      
3 E' 1043 971 37.36      
3 E' 1043 971 37.36      
4 E' 369 344 28.49      
4 E' 369 344 28.49      

Unscaled Zero Point Vibrational Energy (zpe) 1978.8 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 1843.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CID/3-21G
ABC
0.26175 0.26175 0.13088

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 0.000 0.000
O2 0.000 1.638 0.000
O3 1.419 -0.819 0.000
O4 -1.419 -0.819 0.000

Atom - Atom Distances (Å)
  Se1 O2 O3 O4
Se11.63841.63841.6384
O21.63842.83782.8378
O31.63842.83782.8378
O41.63842.83782.8378

picture of selenium trioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 Se1 O3 120.000 O2 Se1 O4 120.000
O3 Se1 O4 120.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability