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Experimental data for H2SO4 (Sulfuric acid)

22 02 02 11 45
Other names
Acide sulfurique; Acido solforico; BOV; Dipping acid; Hydgogen sulfate; Hydrogen sulfate; Matting acid; Nordhausen acid; Oil of vitriol; Schwefelsaeureloesungen; Spent sulfuric acid; Sulfuric Acid; Sulfuric acid, spent; Sulphuric acid; Vitriol brown oil; Vitriol, oil of; Zwavelzuuroplossingen;
INChI INChIKey SMILES IUPAC name
InChI=1S/H2O4S/c1-5(2,3)4/h(H2,1,2,3,4) QAOWNCQODCNURD-UHFFFAOYSA-N OS(=O)(O)=O Sulfuric Acid
State Conformation
1A C1
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -732.73 2.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -719.00 2.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 299.28   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 16.51   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 84.40   J K-1 mol-1 Gurvich
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A 3563   1999Giv/Lar:35      
2 A 1216   1999Giv/Lar:35      
3 A 1136   1999Giv/Lar:35      
4 A 831   1999Giv/Lar:35      
5 A 548   1999Giv/Lar:35      
6 A 422   1999Giv/Lar:35      
7 A 379   1999Giv/Lar:35      
8 A 224   1999Giv/Lar:35      
9 B 3567   1999Giv/Lar:35      
10 B 1452   1999Giv/Lar:35      
11 B 1157   1999Giv/Lar:35      
12 B 882   1999Giv/Lar:35      
13 B 558   1999Giv/Lar:35      
14 B 506   1999Giv/Lar:35      
15 B 288   1999Giv/Lar:35      

vibrational zero-point energy: 8364.1 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for H2SO4 (Sulfuric acid).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.17214 0.16760 0.16281 1981Kuc/Sue:2561

Calculated rotational constants for H2SO4 (Sulfuric acid).
Product of moments of inertia moments of inertia
1019876amu3Å6   4.6699819303575E-114gm3 cm6
Geometric Data
picture of Sulfuric acid

Point Group C2


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rOH 0.970   5 6 1981Kuc/Sue:2561
rSO 1.574   1 4 1981Kuc/Sue:2561
rSO 1.422   1 2 1981Kuc/Sue:2561
aHOS 108.5 1 5 6 1981Kuc/Sue:2561
aOSO 101.3 4 1 5 1981Kuc/Sue:2561
aOSO 123.3 2 1 3 1981Kuc/Sue:2561
dOSOH -90.9 3 1 4 7 1981Kuc/Sue:2561
dOOSOO 88.4 2 3 1 4 1981Kuc/Sue:2561

Cartesians
Atom x (Å) y (Å) z (Å)
S1 0.0000 0.0000 0.1248
O2 1.2510 -0.0349 0.8000
O3 -1.2510 0.0349 0.8000
O4 0.0000 -1.2172 -0.8732
O5 0.0000 1.2172 -0.8732
H6 -0.3548 1.9933 -0.4121
H7 0.3548 -1.9933 -0.4121

Atom - Atom Distances bond lengths
Distances in Å
  S1 O2 O3 O4 O5 H6 H7
S1   1.42201.42201.57401.57402.09462.0946
O2 1.4220   2.50292.40052.43572.85682.4713
O3 1.42202.5029   2.43572.40052.47132.8568
O4 1.57402.40052.4357   2.43433.26270.9700
O5 1.57402.43572.40052.4343   0.97003.2627
H6 2.09462.85682.47133.26270.9700   4.0492
H7 2.09462.47132.85680.97003.26274.0492  

Calculated geometries for H2SO4 (Sulfuric acid).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S1 O4 H7 108.500 S1 O5 H6 108.500
O2 S1 O3 123.300 O2 S1 O4 106.385
O2 S1 O5 108.668 O3 S1 O4 108.668
O3 S1 O5 106.385 O4 S1 O5 101.300

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-O 2
O-S 2
O=S 2

Connectivity
Atom 1 Atom 2
S1 O2
S1 O3
S1 O4
S1 O5
O4 H7
O5 H6
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
12.400 0.050     webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A C1 True       2.725 1981Kuc/Sue:2561   C2 1 3
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for H2SO4 (Sulfuric acid).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A C1 True       C2 1 3

Calculated electric quadrupole moments for H2SO4 (Sulfuric acid).

References
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squib reference DOI
1981Kuc/Sue:2561 Kuczkowski, Suenram, Lovas, Microwave Spectra, Structure, and Dipole Moment of Sulfuric Acid, J. Am. Chem. Soc., Vol. 103, pgs. 2561-2566 10.1021/ja00400a013
1999Giv/Lar:35 A. Given, L. A. Larsen, A. Loewenschuss, C. J. Nielsen, "Matrix isolation mid- and far-infrared spectra of sulfuric acid and deuterated sulfuric acid vapors" J. Mol. Struct. 509 (1999) 35-47 10.1016/S0022-2860(99)00209-4
Gurvich Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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