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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-622.567334
Energy at 298.15K-622.569422
HF Energy-621.979074
Nuclear repulsion energy183.363549
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 CISD/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' 1135 1051 0.00      
2 A2" 514 476 55.77      
3 E' 1474 1365 236.85      
3 E' 1474 1365 236.85      
4 E' 543 503 39.08      
4 E' 543 503 39.08      

Unscaled Zero Point Vibrational Energy (zpe) 2841.6 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 2630.7 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 CISD/6-31G*
ABC
0.34451 0.34451 0.17225

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/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 1.428 0.000
O3 1.237 -0.714 0.000
O4 -1.237 -0.714 0.000

Atom - Atom Distances (Å)
  S1 O2 O3 O4
S11.42811.42811.4281
O21.42812.47362.4736
O31.42812.47362.4736
O41.42812.47362.4736

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