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: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-73.806817
Energy at 298.15K-73.812196
Nuclear repulsion energy114.360241
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 HF/CEP-121G*
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 4064 3672 60.45      
2 A 1282 1158 348.04      
3 A 1280 1156 19.65      
4 A 923 834 102.20      
5 A 588 532 93.64      
6 A 467 422 20.92      
7 A 399 360 1.80      
8 A 275 248 128.76      
9 B 4060 3668 287.63      
10 B 1535 1387 418.81      
11 B 1291 1167 142.22      
12 B 982 887 378.42      
13 B 599 541 68.71      
14 B 528 477 57.64      
15 B 349 315 83.16      

Unscaled Zero Point Vibrational Energy (zpe) 9310.8 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 8411.4 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 HF/CEP-121G*
ABC
0.17166 0.16654 0.16136

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.200
O2 0.000 1.255 0.870
O3 0.000 -1.255 0.870
O4 1.228 -0.027 -0.795
O5 -1.228 0.027 -0.795
H6 -1.464 -0.862 -1.047
H7 1.464 0.862 -1.047

Atom - Atom Distances (Å)
  S1 O2 O3 O4 O5 H6 H7
S11.42271.42271.58101.58102.10772.1077
O21.42272.51092.43412.40603.20952.4436
O31.42272.51092.40602.43412.44363.2095
O41.58102.43412.40602.45592.82920.9538
O51.58102.40602.43412.45590.95382.8292
H62.10773.20952.44362.82920.95383.3975
H72.10772.44363.20950.95382.82923.3975

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 110.025 S1 O5 H6 110.025
O2 S1 O3 123.880 O2 S1 O4 108.144
O2 S1 O5 106.333 O3 S1 O4 106.333
O3 S1 O5 108.144 O4 S1 O5 101.912
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 1.169      
2 O -0.493      
3 O -0.493      
4 O -0.590      
5 O -0.590      
6 H 0.499      
7 H 0.499      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.503 3.503
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.249 6.137 0.000
y 6.137 -36.879 0.000
z 0.000 0.000 -34.872
Traceless
 xyz
x 4.627 6.137 0.000
y 6.137 -3.819 0.000
z 0.000 0.000 -0.808
Polar
3z2-r2-1.616
x2-y25.630
xy6.137
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.766 0.232 0.000
y 0.232 4.306 0.000
z 0.000 0.000 3.748


<r2> (average value of r2) Å2
<r2> 83.327
(<r2>)1/2 9.128