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All results from a given calculation for H2SO4 (Sulfuric acid)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-694.841231
Energy at 298.15K-694.845406
HF Energy-694.249535
Nuclear repulsion energy265.781607
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 QCISD/3-21G
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 3433 3328 5.42      
2 A 1203 1166 106.48      
3 A 978 948 61.19      
4 A 687 666 29.96      
5 A 422 409 25.58      
6 A 362 351 63.28      
7 A 271 263 0.34      
8 A 164 159 23.51      
9 B 3435 3329 114.63      
10 B 1253 1214 41.98      
11 B 1078 1045 51.48      
12 B 800 775 203.13      
13 B 400 388 59.78      
14 B 372 361 69.08      
15 B 198 192 231.31      

Unscaled Zero Point Vibrational Energy (zpe) 7527.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 7296.1 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 QCISD/3-21G
ABC
0.14648 0.14056 0.13190

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.157
O2 -1.373 -0.082 0.931
O3 1.373 0.082 0.931
O4 0.000 1.262 -1.001
O5 0.000 -1.262 -1.001
H6 0.672 1.940 -0.695
H7 -0.672 -1.940 -0.695

Atom - Atom Distances (Å)
  S1 O2 O3 O4 O5 H6 H7
S11.57811.57811.71231.71232.22242.2224
O21.57812.75082.72422.64693.30342.5655
O31.57812.75082.64692.72422.56553.3034
O41.71232.72422.64692.52331.00273.2853
O51.71232.64692.72422.52333.28531.0027
H62.22243.30342.56551.00273.28534.1056
H72.22242.56553.30343.28531.00274.1056

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 38.652 S1 O5 H6 38.652
O2 S1 O3 121.281 O2 S1 O4 111.707
O2 S1 O5 107.043 O3 S1 O4 107.043
O3 S1 O5 111.707 O4 S1 O5 94.924
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability