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

using model chemistry: CCSD(T)/cc-pVTZ

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 CCSD(T)/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/cc-pVTZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-624.301192
Energy at 298.15K-624.305020
HF Energy-623.349671
Nuclear repulsion energy193.574129
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 CCSD(T)/cc-pVTZ
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' 3739 3645        
2 A' 1265 1233        
3 A' 1131 1102        
4 A' 795 775        
5 A' 489 477        
6 A' 428 417        
7 A' 340 331        
8 A" 3737 3643        
9 A" 1116 1087        
10 A" 794 774        
11 A" 452 440        
12 A" 149 145        

Unscaled Zero Point Vibrational Energy (zpe) 7217.1 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 7035.2 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 CCSD(T)/cc-pVTZ
ABC
0.28517 0.25869 0.16352

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.299 0.342 0.000
O2 -1.037 0.945 0.000
O3 0.299 -0.704 1.254
O4 0.299 -0.704 -1.254
H5 -0.633 -0.883 1.457
H6 -0.633 -0.883 -1.457

Atom - Atom Distances (Å)
  S1 O2 O3 O4 H5 H6
S11.46601.63271.63272.11962.1196
O21.46602.46492.46492.37242.3724
O31.63272.46492.50760.97062.8724
O41.63272.46492.50762.87240.9706
H52.11962.37240.97062.87242.9144
H62.11962.37242.87240.97062.9144

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 106.211 S1 O4 H6 106.211
O2 S1 O3 105.276 O2 S1 O4 105.276
O3 S1 O4 100.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability