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Experimental data for SiF+ (silicon monofluoride cation)

22 02 02 11 45
Other names
Fluorosilylidyne; Silicon fluoride; Silylidyne, fluoro-;
INChI INChIKey SMILES IUPAC name
InChI=1S/FSi/c1-2 ZHPNWZCWUUJAJC-UHFFFAOYSA-N [Si]F
State Conformation
2Π C*V
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 -25.23 11.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -27.06 11.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 225.79   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 9.46   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 32.65   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 Σ 848 857 1979HUB/HER      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
857.3251 4.83419 0.019807 0.5812573 5.03859E-03 427.6275 2007Iri:389

vibrational zero-point energy: 423.9 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for SiF+ (silicon monofluoride cation).
More spectroscopic constants are available at the NIST Physics Laboratory website:
http://physics.nist.gov/PhysRefData/MolSpec/Diatomic/Html/Tables/SiF.html
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  0.58121   1979HUB/HER

Calculated rotational constants for SiF+ (silicon monofluoride cation).
Product of moments of inertia moments of inertia
29.00437amu Å2   4.816365E-39gm cm2
Geometric Data
picture of silicon monofluoride cation

Point Group C∞v


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
rSiF 1.604   1 2 NISTdiatomic r0
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