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Experimental data for CH3SiFH2 (fluoromethylsilane)

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INChI INChIKey SMILES IUPAC name
InChI=1S/CH5FSi/c1-3-2/h3H2,1H3 C[SiH2]F
State Conformation
1A' CS
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
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

Calculated vibrational frequencies for CH3SiFH2 (fluoromethylsilane).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for CH3SiFH2 (fluoromethylsilane).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of fluoromethylsilane

Point Group Cs


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 1.597 0.009 2 3 1982Shi/Oya:375-390 rs
rCSi 1.847 0.005 1 2 1982Shi/Oya:375-390
rSiH 1.478 0.002 2 7 1982Shi/Oya:375-390
rCH 1.105 0.005 1 4 1982Shi/Oya:375-390
rCH 1.089 0.001 1 5 1982Shi/Oya:375-390
aCSiF 109.15 0.65 1 2 3 1982Shi/Oya:375-390
aCSiH 112.28 0.27 1 2 7 1982Shi/Oya:375-390
aFSiH 106.43 0.47 3 2 7 1982Shi/Oya:375-390
aHSiH 109.88 0.08 7 2 8 1982Shi/Oya:375-390
aSiCH 108.72 0.65 2 1 4 1982Shi/Oya:375-390
aSiCH 111.33 0.43 2 1 5 1982Shi/Oya:375-390
aHCH 108.38 0.47 4 1 5 1982Shi/Oya:375-390
aHCH 108.57 0.07 5 1 6 1982Shi/Oya:375-390

Cartesians
Atom x (Å) y (Å) z (Å)
C1 -1.3230 -0.7858 0.0000
Si2 0.0000 0.5030 0.0000
F3 1.4280 -0.2120 0.0000
H4 -2.3073 -0.2837 0.0000
H5 -1.2601 -1.4181 0.8844
H6 -1.2601 -1.4181 -0.8844
H7 -0.0432 1.3504 1.2102
H8 -0.0432 1.3504 -1.2102

Atom - Atom Distances bond lengths
Distances in Å
  C1 Si2 F3 H4 H5 H6 H7 H8
C1   1.84702.81021.10501.08901.08902.76872.7687
Si2 1.8470   1.59702.43772.46182.46181.47801.4780
F3 2.81021.5970   3.73603.07613.07612.46382.4638
H4 1.10502.43773.7360   1.77931.77933.04323.0432
H5 1.08902.46183.07611.7793   1.76893.04163.6787
H6 1.08902.46183.07611.77931.7689   3.67873.0416
H7 2.76871.47802.46383.04323.04163.6787   2.4204
H8 2.76871.47802.46383.04323.67873.04162.4204  

Calculated geometries for CH3SiFH2 (fluoromethylsilane).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 Si2 F3 109.150 C1 Si2 H7 112.280
C1 Si2 H8 112.280 Si2 C1 H4 108.720
Si2 C1 H5 111.330 Si2 C1 H6 111.330
F3 Si2 H7 106.430 F3 Si2 H8 106.430
H4 C1 H5 108.380 H4 C1 H6 108.380
H5 C1 H6 108.613 H7 Si2 H8 109.930

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-Si 1
F-Si 1
C-H 3
Si-H 2

Connectivity
Atom 1 Atom 2
C1 Si2
C1 H4
C1 H5
C1 H6
Si2 F3
Si2 H7
Si2 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
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 1A' Cs True 1.652 0.399   1.700 1982Shi/Oya:375-390 x=a, y=b Cs 2 3
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 CH3SiFH2 (fluoromethylsilane).
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 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for CH3SiFH2 (fluoromethylsilane).

References
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squib reference DOI
1982Shi/Oya:375-390 Y Shiki, M Oyamada, M Hayashi "Microwave Spectrum, r, Structure, Dipole Moment, and Internal Rotation of Methyl Fluorosilane" J. MOL. SPECT. 92, 375-390 (1982) 10.1016/0022-2852(82)90109-6

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