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Geometry for Si3H8 (trisilane) 1A1 C2V

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

MP2/STO-3G


Point group is C2v
Atom Internal Principal
x (Å) y (Å) z (Å)   a (Å) b (Å) c (Å)
Si1 0.0000 0.0000 0.8353   0.8353 0.0000 0.0000
Si2 0.0000 1.8941 -0.3936   -0.3936 0.0000 1.8941
Si3 0.0000 -1.8941 -0.3936   -0.3936 0.0000 -1.8941
H4 1.1518 0.0000 1.7009   1.7009 1.1518 0.0000
H5 -1.1518 0.0000 1.7009   1.7009 -1.1518 0.0000
H6 0.0000 3.0623 0.4458   0.4458 0.0000 3.0623
H7 0.0000 -3.0623 0.4458   0.4458 0.0000 -3.0623
H8 1.1601 1.9646 -1.2417   -1.2417 1.1601 1.9646
H9 -1.1601 1.9646 -1.2417   -1.2417 -1.1601 1.9646
H10 -1.1601 -1.9646 -1.2417   -1.2417 -1.1601 -1.9646
H11 1.1601 -1.9646 -1.2417   -1.2417 1.1601 -1.9646
Atom - Atom Distances (Å)
  Si1 Si2 Si3 H4 H5 H6 H7 H8 H9 H10 H11
Si1 2.2579 2.2579 1.4408 1.4408 3.0869 3.0869 3.0854 3.0854 3.0854 3.0854
Si2 2.2579 3.7882 3.0498 3.0498 1.4385 5.0270 1.4388 1.4388 4.1176 4.1176
Si3 2.2579 3.7882 3.0498 3.0498 5.0270 1.4385 4.1176 4.1176 1.4388 1.4388
H4 1.4408 3.0498 3.0498 2.3036 3.5042 3.5042 3.5382 4.2265 4.2265 3.5382
H5 1.4408 3.0498 3.0498 2.3036 3.5042 3.5042 4.2265 3.5382 3.5382 4.2265
H6 3.0869 1.4385 5.0270 3.5042 3.5042 6.1245 2.3234 2.3234 5.4280 5.4280
H7 3.0869 5.0270 1.4385 3.5042 3.5042 6.1245 5.4280 5.4280 2.3234 2.3234
H8 3.0854 1.4388 4.1176 3.5382 4.2265 2.3234 5.4280 2.3203 4.5632 3.9293
H9 3.0854 1.4388 4.1176 4.2265 3.5382 2.3234 5.4280 2.3203 3.9293 4.5632
H10 3.0854 4.1176 1.4388 4.2265 3.5382 5.4280 2.3234 4.5632 3.9293 2.3203
H11 3.0854 4.1176 1.4388 3.5382 4.2265 5.4280 2.3234 3.9293 4.5632 2.3203
Maximum atom distance is 6.1245Å 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 114.046
Calculated Bond Angles (degrees) (Involving Hydrogens)
atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S1 S2 H6 111.321 S1 S2 H8 111.220
S1 S2 H9 111.220 S1 S3 H7 111.321
S1 S3 H10 111.220 S1 S3 H11 111.220
S2 S1 H4 109.086 S2 S1 H5 109.086
S3 S1 H4 109.086 S3 S1 H5 109.086
H4 S1 H5 106.152 H6 S2 H8 107.707
H6 S2 H9 107.707 H7 S3 H10 107.707
H7 S3 H11 107.707 H8 S2 H9 107.479
H10 S3 H11 107.479

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