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Experimental data for SiH3F (monofluorosilane)

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Other names
Fluorosilane; Silane, fluoro-;
INChI INChIKey SMILES IUPAC name
InChI=1S/FH3Si/c1-2/h2H3 XPBBUZJBQWWFFJ-UHFFFAOYSA-N [SiH3]F Fluorosilane
State Conformation
1A1 C3V
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 -376.56 20.90 kJ mol-1 JANAF
Hfg(0K) enthalpy of formation -367.16 20.90 kJ mol-1 JANAF
Entropy (298.15K) entropy 238.40 0.80 J K-1 mol-1 JANAF
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 10.93   kJ mol-1 JANAF
Heat Capacity (298.15K) heat capacity 47.17   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 A1 2206   Shim      
2 A1 990   Shim      
3 A1 872   Shim      
4 E 2196   Shim      
5 E 956   Shim      
6 E 728   Shim      

vibrational zero-point energy: 5914.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for SiH3F (monofluorosilane).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
2.84070 0.47858 0.47858 1983Esc/But:450-475

Calculated rotational constants for SiH3F (monofluorosilane).
Product of moments of inertia moments of inertia
7362.905amu3Å6   3.37145370857227E-116gm3 cm6
Geometric Data
picture of monofluorosilane

Point Group C3v


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
rSiH 1.476   1 3 1998Kuc r0 value
rSiF 1.595   1 2 1998Kuc r0 value
aHSiF 108.269 2 1 3 1998Kuc a0 value
aHSiH 110.64 3 1 4 1998Kuc from symmetry

Cartesians
Atom x (Å) y (Å) z (Å)
Si1 0.0000 0.0000 0.4986
F2 0.0000 0.0000 -1.0959
H3 0.0000 1.4017 0.9613
H4 -1.2139 -0.7008 0.9613
H5 1.2139 -0.7008 0.9613

Atom - Atom Distances bond lengths
Distances in Å
  Si1 F2 H3 H4 H5
Si1   1.59451.47611.47611.4761
F2 1.5945   2.48932.48932.4893
H3 1.47612.4893   2.42782.4278
H4 1.47612.48932.4278   2.4278
H5 1.47612.48932.42782.4278  

Calculated geometries for SiH3F (monofluorosilane).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
F2 Si1 H3 108.269 F2 Si1 H4 108.269
F2 Si1 H5 108.269 H3 Si1 H4 110.646
H3 Si1 H5 110.646 H4 Si1 H5 110.646

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-Si 3
F-Si 1

Connectivity
Atom 1 Atom 2
Si1 F2
Si1 H3
Si1 H4
Si1 H5
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
13.000 1.000 12.600 0.100 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 C3v True       1.297 1983Esc/But:450-475 ± 0.0006 D Laser Stark μ0 C3v 1 1
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 SiH3F (monofluorosilane).
Vibration specific dipole moments
Vibrational Quantum numbers Dip x Dip y Dip z Dip total Squib Comment
0       1.297 1983Esc/But:450-475 ± 0.00057
ν2 = 1       1.306 1983Esc/But:450-475 ± 0.00061
ν5 = 1       1.302 1983Esc/But:450-475 ± 0.00064

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 C3v True       C3v 1 1

Calculated electric quadrupole moments for SiH3F (monofluorosilane).

References
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squib reference DOI
1983Esc/But:450-475 R Escribano, RJ Butcher "Laser Stark Spectroscopy of Silyl Fluoride in the 10 μm Region: Analysis of the ν2 and ν5 Bands" J. Mol. Spect. 99, 450-475, (1983) DOI:10.1016/0022-2852(83)90325-9
1998Kuc K Kuchitsu(ed) "Structure of Free Polyatomic Molecules - Basic Data" Springer, Berlin, 1998 10.1007/978-3-642-45748-7 
JANAF Chase, M.W., Jr.; Davies, C.A.; Downey, J.R., Jr.; Frurip, D.J.; McDonald, R.A.; Syverud, A.N., JANAF Thermochemical Tables (Third Edition), J. Phys. Chem. Ref. Data,Suppl. 1, 1985, 14, 1.  
Shim Shimanouchi, T. , Tables of Molecular Vibrational Frequencies, Consolidated Volu 10.6028/NBS.NSRDS.39
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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