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Release 22May 2022
NIST Standard Reference Database 101
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II.A.3. (XII.A.1.)

Listing of experimental geometry data for SiH2F2 (difluorosilane)

Rotational Constants (cm-1)


See section I.F.4 to change rotational constant units
A B C
0.82360 0.26025 0.21272
Rotational Constants from 2003Deu/Dem:12-21
Calculated rotational constants for SiH2F2 (difluorosilane).

Point Group C2v

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
rSiH 1.462 1 4 2003Deu/Dem:12-21 re semiexperimental
rSiF 1.576 1 2 2003Deu/Dem:12-21
aHSiH 114.57 4 1 5 2003Deu/Dem:12-21
aFSiF 107.78 2 1 3 2003Deu/Dem:12-21
picture of difluorosilane

Bond descriptions


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

Atom x (Å) y (Å) z (Å)
Si1 0.0000 0.0000 0.4452
F2 0.0000 1.2731 -0.4835
F3 0.0000 -1.2731 -0.4835
H4 1.2297 0.0000 1.2351
H5 -1.2297 0.0000 1.2351

Atom - Atom Distances (Å)

  Si1 F2 F3 H4 H5
Si11.57581.57581.46151.4615
F21.57582.54612.46702.4670
F31.57582.54612.46702.4670
H41.46152.46702.46702.4593
H51.46152.46702.46702.4593

Calculated geometries for SiH2F2 (difluorosilane).
References
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squib reference DOI
2003Deu/Dem:12-21 JF D'Eu, J. Demaison, H Burger "Millimeter-wave and high-resolution FTIR spectroscopy of SiH2F2: the ground and v4=1 states" J. Mol. Spect. 218 (2003) 12–21 10.1016/S0022-2852(02)00008-5

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