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Experimental data for IF (Iodine monofluoride)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/FI/c1-2 PDJAZCSYYQODQF-UHFFFAOYSA-N IF
State Conformation
1Σ 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 -94.76   kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ mol-1 webbook
Entropy (298.15K) entropy 236.27   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 Σ 604 610 webbook      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
610.24 3.123 -0.00347 0.27971 0.001873 webbook

vibrational zero-point energy: 302.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for IF (Iodine monofluoride).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  0.27971   webbook

Calculated rotational constants for IF (Iodine monofluoride).
Product of moments of inertia moments of inertia
60.26824amu Å2   1.000793E-38gm cm2
Geometric Data
picture of Iodine monofluoride

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
rFI 1.910   1 2 webbook re

Cartesians
Atom x (Å) y (Å) z (Å)
I1 0.0000 0.0000 0.0000
F2 0.0000 0.0000 1.9098

Atom - Atom Distances bond lengths
Distances in Å
  I1 F2
I1   1.9098
F2 1.9098  

Calculated geometries for IF (Iodine monofluoride).

Bond descriptions


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

Connectivity
Atom 1 Atom 2
I1 F2
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Σ

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference Comment
10.540 0.010     webbook EA lower limit

Electron Affinity (eV)
Electron Affinity unc. reference Comment
1.000 0.190 webbook EA lower limit
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 1Σ C∞v True       1.948 1979Nai/Hoe:253-256 ± 0.020 MW μ0 C∞v 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 IF (Iodine monofluoride).
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 1Σ C∞v True       C∞v 1 1

Calculated electric quadrupole moments for IF (Iodine monofluoride).

References
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squib reference DOI
1979Nai/Hoe:253-256 KPR Nair, J Hoeft, E Tiemann "Electric Dipole Moment of the diatomic IF molecule" Chem. Phys. Lett. 60 (2) 253-256, 1979 10.1016/0009-2614(79)80027-5
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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