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II.A.3. (XII.A.1.)

Listing of experimental geometry data for Si(CH3)4 (tetramethylsilane)

Rotational Constants (cm-1)
See section I.F.4 to change rotational constant units
A B C
0.10409 0.10409 0.10409
Rotational Constants from
Calculated rotational constants for Si(CH3)4 (tetramethylsilane).

Point Group Td

Internal coordinates (distances (r) in Å) (angles (a) in degrees) (dihedrals (d) in degrees)
Description Value Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCH 1.115 2 6 1976Hellwege(II/7) ED
rSiC 1.875 1 2 1976Hellwege(II/7) ED
aHCH 109.8 6 2 7 1976Hellwege(II/7)
aSiCH 109.2 1 2 6 1976Hellwege(II/7) ED
picture of tetramethylsilane

Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-Si 4
H-C 12

Atom x (Å) y (Å) z (Å)
Si1 0.0000 0.0000 0.0000
C2 1.0825 1.0825 1.0825
C3 -1.0825 -1.0825 1.0825
C4 -1.0825 1.0825 -1.0825
C5 1.0825 -1.0825 -1.0825
H6 1.7241 0.4345 1.7241
H7 1.7241 1.7241 0.4345
H8 0.4345 1.7241 1.7241
H9 -1.7241 -1.7241 0.4345
H10 -0.4345 -1.7241 1.7241
H11 -1.7241 -0.4345 1.7241
H12 -1.7241 0.4345 -1.7241
H13 -1.7241 1.7241 -0.4345
H14 -0.4345 1.7241 -1.7241
H15 1.7241 -1.7241 -0.4345
H16 0.4345 -1.7241 -1.7241
H17 1.7241 -0.4345 -1.7241

Atom - Atom Distances (Å)
  Si1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17
Si11.87501.87501.87501.87502.47672.47672.47672.47672.47672.47672.47672.47672.47672.47672.47672.4767
C21.87503.06193.06193.06191.11501.11501.11504.02183.25433.25434.02183.25433.25433.25434.02183.2543
C31.87503.06193.06193.06193.25434.02183.25431.11501.11501.11503.25433.25434.02183.25433.25434.0218
C41.87503.06193.06193.06194.02183.25433.25433.25434.02183.25431.11501.11501.11504.02183.25433.2543
C51.87503.06193.06193.06193.25433.25434.02183.25433.25434.02183.25434.02183.25431.11501.11501.1150
H62.47671.11503.25434.02183.25431.82381.82384.26773.05273.55604.87654.26774.26773.05274.26773.5560
H72.47671.11504.02183.25433.25431.82381.82384.87654.26774.26774.26773.55603.05273.55604.26773.0527
H82.47671.11503.25433.25434.02181.82381.82384.26773.55603.05274.26773.05273.55604.26774.87654.2677
H92.47674.02181.11503.25433.25434.26774.87654.26771.82381.82383.05273.55604.26773.55603.05274.2677
H102.47673.25431.11504.02183.25433.05274.26773.55601.82381.82384.26774.26774.87653.05273.55604.2677
H112.47673.25431.11503.25434.02183.55604.26773.05271.82381.82383.55603.05274.26774.26774.26774.8765
H122.47674.02183.25431.11503.25434.87654.26774.26773.05274.26773.55601.82381.82384.26773.05273.5560
H132.47673.25433.25431.11504.02184.26773.55603.05273.55604.26773.05271.82381.82384.87654.26774.2677
H142.47673.25434.02181.11503.25434.26773.05273.55604.26774.87654.26771.82381.82384.26773.55603.0527
H152.47673.25433.25434.02181.11503.05273.55604.26773.55603.05274.26774.26774.87654.26771.82381.8238
H162.47674.02183.25433.25431.11504.26774.26774.87653.05273.55604.26773.05274.26773.55601.82381.8238
H172.47673.25434.02183.25431.11503.55603.05274.26774.26774.26774.87653.55604.26773.05271.82381.8238

Calculated geometries for Si(CH3)4 (tetramethylsilane).


References
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squib reference DOI
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  

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