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 H2SO4 (Sulfuric acid)

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 C1 1A
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-698.764311
Energy at 298.15K-698.769536
HF Energy-698.037307
Nuclear repulsion energy289.015469
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 A 3886 3598 58.42      
2 A 1279 1185 209.06      
3 A 1248 1155 111.82      
4 A 889 823 112.56      
5 A 572 530 80.35      
6 A 451 418 22.74      
7 A 381 353 2.86      
8 A 252 233 122.96      
9 B 3881 3593 275.06      
10 B 1542 1427 352.53      
11 B 1262 1169 120.88      
12 B 953 882 373.35      
13 B 573 530 54.66      
14 B 511 473 54.23      
15 B 332 307 78.78      

Unscaled Zero Point Vibrational Energy (zpe) 9005.8 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 8337.5 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
0.16987 0.16546 0.15986

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.159
O2 0.000 1.260 0.825
O3 0.000 -1.260 0.825
O4 1.234 -0.033 -0.846
O5 -1.234 0.033 -0.846
H6 -1.466 -0.871 -1.099
H7 1.466 0.871 -1.099

Atom - Atom Distances (Å)
  S1 O2 O3 O4 O5 H6 H7
S11.42531.42531.59201.59202.11882.1188
O21.42532.52052.44682.41263.22362.4494
O31.42532.52052.41262.44682.44943.2236
O41.59202.44682.41262.46982.83880.9670
O51.59202.41262.44682.46980.96702.8388
H62.11883.22362.44942.83880.96703.4106
H72.11882.44943.22360.96702.83883.4106

picture of Sulfuric acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 O4 H7 109.348 S1 O5 H6 109.348
O2 S1 O3 124.302 O2 S1 O4 108.247
O2 S1 O5 106.052 O3 S1 O4 106.052
O3 S1 O5 108.247 O4 S1 O5 101.737
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability