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All results from a given calculation for SO3 (Sulfur trioxide)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-622.702030
Energy at 298.15K-622.703918
HF Energy-621.964287
Nuclear repulsion energy178.187862
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 MP4/6-31G*
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' 942 900        
2 A2" 443 423        
3 E' 1318 1258        
3 E' 1318 1258        
4 E' 479 458        
4 E' 479 458        

Unscaled Zero Point Vibrational Energy (zpe) 2489.5 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 2377.0 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 MP4/6-31G*
ABC
0.32539 0.32539 0.16270

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.000
O2 0.000 1.469 0.000
O3 1.273 -0.735 0.000
O4 -1.273 -0.735 0.000

Atom - Atom Distances (Å)
  S1 O2 O3 O4
S11.46951.46951.4695
O21.46952.54522.5452
O31.46952.54522.5452
O41.46952.54522.5452

picture of Sulfur trioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 S1 O3 120.000 O2 S1 O4 120.000
O3 S1 O4 120.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability