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 H2SO3 (Sulfurous acid)

using model chemistry: CCSD(T)/6-31G*

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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-623.900369
Energy at 298.15K-623.904150
HF Energy-623.181463
Nuclear repulsion energy190.797784
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)/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 A' 3623 3486        
2 A' 1272 1224        
3 A' 1141 1098        
4 A' 776 747        
5 A' 476 458        
6 A' 451 434        
7 A' 312 300        
8 A" 3621 3484        
9 A" 1146 1103        
10 A" 780 751        
11 A" 438 421        
12 A" 167 160        

Unscaled Zero Point Vibrational Energy (zpe) 7101.2 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 6832.0 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)/6-31G*
ABC
0.27717 0.25086 0.15878

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.301 0.349 0.000
O2 -1.046 0.962 0.000
O3 0.301 -0.714 1.274
O4 0.301 -0.714 -1.274
H5 -0.638 -0.929 1.472
H6 -0.638 -0.929 -1.472

Atom - Atom Distances (Å)
  S1 O2 O3 O4 H5 H6
S11.48031.65931.65932.16392.1639
O21.48032.49932.49932.43022.4302
O31.65932.49932.54770.98402.9100
O41.65932.49932.54772.91000.9840
H52.16392.43020.98402.91002.9438
H62.16392.43022.91000.98402.9438

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 107.116 S1 O4 H6 107.116
O2 S1 O3 105.368 O2 S1 O4 105.368
O3 S1 O4 100.292
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability