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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 1A'
1 2 yes CS 1A'

Conformer 1 (CS)

Jump to S1C2
Energy calculated at G4
 hartrees
Energy at 0K-624.862066
Energy at 298.15K-624.856221
Nuclear repulsion energy 
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)
Rotational Constants (cm-1) from geometry optimized at B3LYP/6-31G(2df,p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at G4
 hartrees
Energy at 0K-624.862066
Energy at 298.15K-624.866124
HF Energy-625.055088
Nuclear repulsion energy193.262062
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 A' 3708 3578 87.04      
2 A' 1256 1212 149.06      
3 A' 1117 1078 6.99      
4 A' 764 738 127.60      
5 A' 479 462 11.17      
6 A' 429 414 121.91      
7 A' 326 315 24.34      
8 A" 3704 3575 30.90      
9 A" 1090 1052 54.65      
10 A" 764 737 310.77      
11 A" 447 431 50.32      
12 A" 172 166 17.92      

Unscaled Zero Point Vibrational Energy (zpe) 7127.8 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 6878.3 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 B3LYP/6-31G(2df,p)
ABC
0.28511 0.25700 0.16224

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.296 0.339 0.000
O2 -1.026 0.959 0.000
O3 0.296 -0.705 1.260
O4 0.296 -0.705 -1.260
H5 -0.630 -0.912 1.472
H6 -0.630 -0.912 -1.472

Atom - Atom Distances (Å)
  S1 O2 O3 O4 H5 H6
S11.45991.63651.63652.14222.1422
O21.45992.47072.47072.41332.4133
O31.63652.47072.52080.97242.8926
O41.63652.47072.52082.89260.9724
H52.14222.41330.97242.89262.9441
H62.14222.41332.89260.97242.9441

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 108.759 S1 O4 H6 108.759
O2 S1 O3 106.917 O2 S1 O4 106.917
O3 S1 O4 101.876
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 0.424      
2 O -0.322      
3 O -0.352      
4 O -0.352      
5 H 0.301      
6 H 0.301      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.931 -1.477 0.000 1.746
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> 78.618
(<r2>)1/2 8.867