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All results from a given calculation for H2SO3 (Sulfurous acid)

using model chemistry: TPSSh/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at TPSSh/6-31+G**
Rotational Constants (cm-1) from geometry optimized at TPSSh/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31+G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at TPSSh/6-31+G**
 hartrees
Energy at 0K-625.026038
Energy at 298.15K-625.029550
HF Energy-625.026038
Nuclear repulsion energy189.896907
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 TPSSh/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3675 3537 86.62      
2 A' 1209 1164 178.01      
3 A' 1081 1040 18.30      
4 A' 726 699 149.29      
5 A' 452 435 16.95      
6 A' 397 382 154.44      
7 A' 306 295 19.33      
8 A" 3672 3534 38.85      
9 A" 1050 1010 47.88      
10 A" 720 693 373.74      
11 A" 413 397 55.18      
12 A" 95 92 27.15      

Unscaled Zero Point Vibrational Energy (zpe) 6897.9 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 6639.3 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 TPSSh/6-31+G**
ABC
0.27493 0.24814 0.15607

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.299 0.344 0.000
O2 -1.038 0.986 0.000
O3 0.299 -0.719 1.284
O4 0.299 -0.719 -1.284
H5 -0.629 -0.935 1.510
H6 -0.629 -0.935 -1.510

Atom - Atom Distances (Å)
  S1 O2 O3 O4 H5 H6
S11.48301.66681.66682.18522.1852
O21.48302.51842.51842.47712.4771
O31.66682.51842.56760.97872.9514
O41.66682.51842.56762.95140.9787
H52.18522.47710.97872.95143.0194
H62.18522.47712.95140.97873.0194

picture of Sulfurous acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 O3 H5 108.563 S1 O4 H6 108.563
O2 S1 O3 106.028 O2 S1 O4 106.028
O3 S1 O4 100.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 1.013      
2 O -0.643      
3 O -0.561      
4 O -0.561      
5 H 0.376      
6 H 0.376      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.955 -1.296 0.000 1.610
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 4.682 -0.551 0.000
y -0.551 4.880 0.000
z 0.000 0.000 5.357


<r2> (average value of r2) Å2
<r2> 81.816
(<r2>)1/2 9.045