return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at G4
 hartrees
Energy at 0K-7549.845892
Energy at 298.15K-7549.841395
HF Energy-623.819697
Nuclear repulsion energy182.877063
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 B3LYP/6-31G(2df,p)
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' 1064 1027 0.00 29.39 0.07 0.13
2 A2" 489 471 30.97 0.00 0.75 0.86
3 E' 1396 1347 158.08 4.62 0.75 0.86
3 E' 1395 1347 158.06 4.62 0.75 0.86
4 E' 517 499 24.28 2.93 0.75 0.86
4 E' 517 499 24.28 2.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 2688.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 2594.6 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 B3LYP/6-31G(2df,p)
ABC
0.34268 0.34268 0.17134

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.000
O2 0.000 1.432 0.000
O3 1.240 -0.716 0.000
O4 -1.240 -0.716 0.000

Atom - Atom Distances (Å)
  S1 O2 O3 O4
S11.43191.43191.4319
O21.43192.48012.4801
O31.43192.48012.4801
O41.43192.48012.4801

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
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.688      
2 O -0.229      
3 O -0.229      
4 O -0.229      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 66.978
(<r2>)1/2 8.184