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Experimental data for F2SO (Thionyl Fluoride)

22 02 02 11 45
Other names
Sulfur difluoride oxide; Sulfurous oxyfluoride; Thionyl difluoride; Sulfur difluoride monoxide; sulfurous difluoride;
INChI INChIKey SMILES IUPAC name
InChI=1S/F2OS/c1-4(2)3 LSJNBGSOIVSBBR-UHFFFAOYSA-N O=S(F)F sulfurous difluoride
State Conformation
1A' CS
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 -543.92   kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ mol-1 webbook
Entropy (298.15K) entropy 279.13   J K-1 mol-1 webbook
Heat Capacity (298.15K) heat capacity 57.08   J K-1 mol-1 webbook
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' 1335   1972Luc/Smi:327      
2 A' 808   1972Luc/Smi:327      
3 A' 530   1972Luc/Smi:327      
4 A' 378   1972Luc/Smi:327      
5 A" 747   1972Luc/Smi:327      
6 A" 393   1972Luc/Smi:327      

vibrational zero-point energy: 2095.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for F2SO (Thionyl Fluoride).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.28736 0.27876 0.16521 1972Luc/Smi:327

Calculated rotational constants for F2SO (Thionyl Fluoride).
Product of moments of inertia moments of inertia
361988.7amu3Å6   1.65753620747212E-114gm3 cm6
Geometric Data
picture of Thionyl Fluoride

Point Group Cs


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
rOS 1.413 0.000 1 2 1972Luc/Smi:327 r0
rFS 1.585 0.000 1 3 1972Luc/Smi:327 r0
aFSF 92.83 0.02 3 1 4 1972Luc/Smi:327 r0
aOSF 106.82 0.03 2 1 3 1972Luc/Smi:327 r0

Cartesians
Atom x (Å) y (Å) z (Å)
S1 0.2465 0.3814 0.0000
O2 -1.0476 0.9488 0.0000
F3 0.2465 -0.7607 1.0990
F4 0.2465 -0.7607 -1.0990

Atom - Atom Distances bond lengths
Distances in Å
  S1 O2 F3 F4
S1   1.41301.58501.5850
O2 1.4130   2.40932.4093
F3 1.58502.4093   2.1980
F4 1.58502.40932.1980  

Calculated geometries for F2SO (Thionyl Fluoride).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
O2 S1 F3 106.820 O2 S1 F4 106.820
F3 S1 F4 87.794

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
O=S 1
F-S 2

Connectivity
Atom 1 Atom 2
S1 O2
S1 F3
S1 F4
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
12.250 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' Cs True           Cs 2 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 F2SO (Thionyl Fluoride).
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' Cs True       Cs 2 3

Calculated electric quadrupole moments for F2SO (Thionyl Fluoride).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
3.927 0.119 2015Tha/Wu:144302

Calculated electric dipole polarizability for F2SO (Thionyl Fluoride).

References
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squib reference DOI
1972Luc/Smi:327 NJD Lucas, JG Smith "The microwave spectrum and harmonic force field of thionyl fluoride" J. Mol. Spect. 43, 327-341 (1972) 10.1016/0022-2852(72)90044-6
2015Tha/Wu:144302 AJ Thakkar, T Wu "How well do static electronic dipole polarizabilities from gas-phase experiments compare with density functional and MP2 computations?" J. Chem. Phys. 143, 144302 (2015) 10.1063/1.4932594
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

Got a better number? Please email us at cccbdb@nist.gov


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