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Experimental data for SF2 (sulfur difluoride)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/F2S/c1-3-2 QTJXVIKNLHZIKL-UHFFFAOYSA-N FSF
State Conformation
1A1 C2V
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 -293.19 10.00 kJ mol-1 Gurvich -289.3 +- 6.2 From 1995Iri:5357
Hfg(0K) enthalpy of formation -291.00 10.00 kJ mol-1 Gurvich -289.3 +- 6.2 From 1995Iri:5357
Entropy (298.15K) entropy 257.60 0.10 J K-1 mol-1 1995Iri:5357
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 11.22 0.01 kJ mol-1 1995Iri:5357
Heat Capacity (298.15K) heat capacity 44.41   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 A1 839   webbook      
2 A1 355   webbook      
3 B2 813   webbook      

vibrational zero-point energy: 1003.3 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for SF2 (sulfur difluoride).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.89897 0.30728 0.22835 NISTtriatomic

Calculated rotational constants for SF2 (sulfur difluoride).
Product of moments of inertia moments of inertia
75945.09amu3Å6   3.47750457818625E-115gm3 cm6
Geometric Data
picture of sulfur difluoride

Point Group C2v


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
rSF 1.587 0.000 1 2 1998Kuc
aFSF 98.048 0.013 2 1 3 1998Kuc

Cartesians
Atom x (Å) y (Å) z (Å)
S1 0.0000 0.0000 0.5511
F2 0.0000 1.1985 -0.4899
F3 0.0000 -1.1985 -0.4899

Atom - Atom Distances bond lengths
Distances in Å
  S1 F2 F3
S1   1.58751.5875
F2 1.5875   2.3970
F3 1.58752.3970  

Calculated geometries for SF2 (sulfur difluoride).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle
F2 S1 F3 98.048

Bond descriptions


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

Connectivity
Atom 1 Atom 2
S1 F2
S1 F3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
10.080       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 1A1 C2v True     1.050 1.050 NISTtriatomic MW μ0 C2v 1 2
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 SF2 (sulfur difluoride).
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 1A1 C2v True       C2v 1 2

Calculated electric quadrupole moments for SF2 (sulfur difluoride).

References
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squib reference DOI
1995Iri:5357 KK Irikura " STRUCTURE AND THERMOCHEMISTRY OF SULFUR FLUORIDES SFN (N=1-5) AND THEIR IONS SFN+ (N=1-5)" JOURNAL OF CHEMICAL PHYSICS 102, 5357-5367, 1995 10.1063/1.469263
1998Kuc K Kuchitsu(ed) "Structure of Free Polyatomic Molecules - Basic Data" Springer, Berlin, 1998 10.1007/978-3-642-45748-7 
Gurvich Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989  
NISTtriatomic NIST Triatomic Spectral Database (http://www.physics.nist.gov/PhysRefData/MolSpec/Triatomic/index.html) 10.18434/T4DW2S
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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