return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Experimental > One molecule all properties

Experimental data for CH3F (Methyl fluoride)

22 02 02 11 45
Other names
Fluoromethane; Freon 41; Methane, fluoro-; Methyl fluoride;
INChI INChIKey SMILES IUPAC name
InChI=1S/CH3F/c1-2/h1H3 NBVXSUQYWXRMNV-UHFFFAOYSA-N CF Fluoromethane
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 -255.00 15.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -246.97 15.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 222.82   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 10.14   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 37.50   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 2930   Shim 37.4   1952Bar/McK:1494 Intensity from 1952Bar/McK:1494 CH3 s-stretch
2 A1 1464   Shim 3.4   1952Bar/McK:1494 CH3 s-deform
3 A1 1049   Shim 108.4   1952Bar/McK:1494 CF stretch
4 E 3006   Shim 37.4   1952Bar/McK:1494 CH3 d-stretch
5 E 1467   Shim 6.0   1952Bar/McK:1494 CH3 d-deform
6 E 1182   Shim 1.7   1952Bar/McK:1494 CH3 rock

vibrational zero-point energy: 8376.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH3F (Methyl fluoride).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
5.18200 0.85179 0.85179 1993Pap/Hsu:33

Calculated rotational constants for CH3F (Methyl fluoride).
Product of moments of inertia moments of inertia
1274.156amu3Å6   5.83432299759228E-117gm3 cm6
Geometric Data
picture of Methyl fluoride

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
rCH 1.087 0.001 1 3 1999Dem/Bre:129
rCF 1.383 0.001 1 2 1999Dem/Bre:129
aHCH 110.2 0.1 3 1 4 1999Dem/Bre:129
aHCF 108.73 0.1 2 1 3 1999Dem/Bre:129 From symmetry

Cartesians
Atom x (Å) y (Å) z (Å)
C1 0.0000 0.0000 -0.6244
F2 0.0000 0.0000 0.7402
H3 0.0000 1.0245 -0.9718
H4 0.8873 -0.5123 -0.9718
H5 -0.8873 -0.5123 -0.9718

Atom - Atom Distances bond lengths
Distances in Å
  C1 F2 H3 H4 H5
C1   1.36461.08181.08181.0818
F2 1.3646   1.99511.99511.9951
H3 1.08181.9951   1.77451.7745
H4 1.08181.99511.7745   1.7745
H5 1.08181.99511.77451.7745  

Calculated geometries for CH3F (Methyl fluoride).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
F2 C1 H3 108.730 F2 C1 H4 108.730
F2 C1 H5 108.730 H3 C1 H4 110.202
H3 C1 H5 110.202 H4 C1 H5 110.202

Bond descriptions


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

Connectivity
Atom 1 Atom 2
C1 F2
C1 H3
C1 H4
C1 H5
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1
An error occurred on the server when processing the URL. Please contact the system administrator.

If you are the system administrator please click here to find out more about this error.