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Geometry for Si3H8 (trisilane) 1A1 C2V

1910171554
InChI=1S/H8Si3/c1-3-2/h3H2,1-2H3 INChIKey=VEDJZFSRVVQBIL-UHFFFAOYSA-N

HF/3-21G


Point group is C2v
Atom Internal Principal
x (Å) y (Å) z (Å)   a (Å) b (Å) c (Å)
Si1 0.0000 0.0000 0.9351   0.9351 0.0000 0.0000
Si2 0.0000 1.9490 -0.4373   -0.4373 0.0000 1.9490
Si3 0.0000 -1.9490 -0.4373   -0.4373 0.0000 -1.9490
H4 1.2111 0.0000 1.8012   1.8012 1.2111 0.0000
H5 -1.2111 0.0000 1.8012   1.8012 -1.2111 0.0000
H6 0.0000 3.1881 0.3858   0.3858 0.0000 3.1881
H7 0.0000 -3.1881 0.3858   0.3858 0.0000 -3.1881
H8 1.2084 1.9372 -1.3054   -1.3054 1.2084 1.9372
H9 -1.2084 1.9372 -1.3054   -1.3054 -1.2084 1.9372
H10 -1.2084 -1.9372 -1.3054   -1.3054 -1.2084 -1.9372
H11 1.2084 -1.9372 -1.3054   -1.3054 1.2084 -1.9372
Atom - Atom Distances (Å)
  Si1 Si2 Si3 H4 H5 H6 H7 H8 H9 H10 H11
Si1 2.3837 2.3837 1.4890 1.4890 3.2351 3.2351 3.1989 3.1989 3.1989 3.1989
Si2 2.3837 3.8980 3.2056 3.2056 1.4876 5.2026 1.4880 1.4880 4.1613 4.1613
Si3 2.3837 3.8980 3.2056 3.2056 5.2026 1.4876 4.1613 4.1613 1.4880 1.4880
H4 1.4890 3.2056 3.2056 2.4223 3.6924 3.6924 3.6611 4.3884 4.3884 3.6611
H5 1.4890 3.2056 3.2056 2.4223 3.6924 3.6924 4.3884 3.6611 3.6611 4.3884
H6 3.2351 1.4876 5.2026 3.6924 3.6924 6.3762 2.4260 2.4260 5.5308 5.5308
H7 3.2351 5.2026 1.4876 3.6924 3.6924 6.3762 5.5308 5.5308 2.4260 2.4260
H8 3.1989 1.4880 4.1613 3.6611 4.3884 2.4260 5.5308 2.4168 4.5664 3.8745
H9 3.1989 1.4880 4.1613 4.3884 3.6611 2.4260 5.5308 2.4168 3.8745 4.5664
H10 3.1989 4.1613 1.4880 4.3884 3.6611 5.5308 2.4260 4.5664 3.8745 2.4168
H11 3.1989 4.1613 1.4880 3.6611 4.3884 5.5308 2.4260 3.8745 4.5664 2.4168
Maximum atom distance is 6.3762Å between atoms H6 and H7.
picture of trisilane
Calculated Bond Angles (degrees) (Ignoring Hydrogens)
atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S2 S1 S3 109.699
Calculated Bond Angles (degrees) (Involving Hydrogens)
atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S1 S2 H6 111.254 S1 S2 H8 109.235
S1 S2 H9 109.235 S1 S3 H7 111.254
S1 S3 H10 109.235 S1 S3 H11 109.235
S2 S1 H4 109.566 S2 S1 H5 109.566
S3 S1 H4 109.566 S3 S1 H5 109.566
H4 S1 H5 108.861 H6 S2 H8 109.233
H6 S2 H9 109.233 H7 S3 H10 109.233
H7 S3 H11 109.233 H8 S2 H9 108.606
H10 S3 H11 108.606

For information on specific bond angles or dihedrals see the geometry comparison page in section Comparisons > Geometry > Bonds, angles.