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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B1B95/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-582.584037
Energy at 298.15K-582.589865
HF Energy-582.584037
Nuclear repulsion energy90.903927
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B1B95/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1g 2222 2128 0.00      
2 A1g 912 874 0.00      
3 A1g 433 415 0.00      
4 A1u 144 138 0.00      
5 A2u 2215 2121 111.40      
6 A2u 839 803 460.77      
7 Eg 2225 2131 0.00      
7 Eg 2225 2131 0.00      
8 Eg 934 895 0.00      
8 Eg 934 895 0.00      
9 Eg 628 602 0.00      
9 Eg 628 602 0.00      
10 Eu 2234 2140 177.60      
10 Eu 2234 2140 177.58      
11 Eu 947 907 71.44      
11 Eu 947 907 71.46      
12 Eu 375 359 16.11      
12 Eu 375 359 16.11      

Unscaled Zero Point Vibrational Energy (zpe) 10726.5 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 10272.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B1B95/6-31G(2df,p)
ABC
1.44128 0.16966 0.16966

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(2df,p)

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.168
Si2 0.000 0.000 -1.168
H3 0.000 1.391 1.687
H4 -1.204 -0.695 1.687
H5 1.204 -0.695 1.687
H6 0.000 -1.391 -1.687
H7 -1.204 0.695 -1.687
H8 1.204 0.695 -1.687

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.33571.48441.48441.48443.17523.17523.1752
Si22.33573.17523.17523.17521.48441.48441.4844
H31.48443.17522.40892.40894.37203.64863.6486
H41.48443.17522.40892.40893.64863.64864.3720
H51.48443.17522.40892.40893.64864.37203.6486
H63.17521.48444.37203.64863.64862.40892.4089
H73.17521.48443.64863.64864.37202.40892.4089
H83.17521.48443.64864.37203.64862.40892.4089

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.454 Si1 Si2 H7 110.454
Si1 Si2 H8 110.454 Si2 Si1 H3 110.454
Si2 Si1 H4 110.454 Si2 Si1 H5 110.454
H3 Si1 H4 108.471 H3 Si1 H5 108.471
H4 Si1 H5 108.471 H6 Si2 H7 108.471
H6 Si2 H8 108.471 H7 Si2 H8 108.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si -0.075      
2 Si -0.075      
3 H 0.025      
4 H 0.025      
5 H 0.025      
6 H 0.025      
7 H 0.025      
8 H 0.025      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.601 0.000 0.000
y 0.000 -30.601 0.000
z 0.000 0.000 -31.623
Traceless
 xyz
x 0.511 0.000 0.000
y 0.000 0.511 0.000
z 0.000 0.000 -1.022
Polar
3z2-r2-2.043
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.961 0.000 0.000
y 0.000 6.961 0.000
z 0.000 0.000 9.840


<r2> (average value of r2) Å2
<r2> 86.185
(<r2>)1/2 9.284