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All results from a given calculation for Si2H6 (disilane)

using model chemistry: HF/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at HF/6-311G*
 hartrees
Energy at 0K-581.343174
Energy at 298.15K-581.349267
HF Energy-581.343174
Nuclear repulsion energy90.455832
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 HF/6-311G*
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 2339 2116 0.00      
2 A1g 1031 933 0.00      
3 A1g 448 405 0.00      
4 A1u 135 122 0.00      
5 A2u 2323 2101 177.60      
6 A2u 947 856 790.32      
7 Eg 2318 2097 0.00      
7 Eg 2318 2097 0.00      
8 Eg 1024 926 0.00      
8 Eg 1024 926 0.00      
9 Eg 695 628 0.00      
9 Eg 695 628 0.00      
10 Eu 2328 2105 323.50      
10 Eu 2328 2105 323.50      
11 Eu 1040 940 153.75      
11 Eu 1040 940 153.75      
12 Eu 417 377 43.09      
12 Eu 417 377 43.09      

Unscaled Zero Point Vibrational Energy (zpe) 11432.6 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 10339.7 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 HF/6-311G*
ABC
1.45128 0.16652 0.16652

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.181
Si2 0.000 0.000 -1.181
H3 0.000 1.386 1.695
H4 -1.200 -0.693 1.695
H5 1.200 -0.693 1.695
H6 0.000 -1.386 -1.695
H7 -1.200 0.693 -1.695
H8 1.200 0.693 -1.695

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.36221.47811.47811.47813.19253.19253.1925
Si22.36223.19253.19253.19251.47811.47811.4781
H31.47813.19252.40062.40064.37873.66203.6620
H41.47813.19252.40062.40063.66203.66204.3787
H51.47813.19252.40062.40063.66204.37873.6620
H63.19251.47814.37873.66203.66202.40062.4006
H73.19251.47813.66203.66204.37872.40062.4006
H83.19251.47813.66204.37873.66202.40062.4006

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.337 Si1 Si2 H7 110.337
Si1 Si2 H8 110.337 Si2 Si1 H3 110.337
Si2 Si1 H4 110.337 Si2 Si1 H5 110.337
H3 Si1 H4 108.592 H3 Si1 H5 108.592
H4 Si1 H5 108.592 H6 Si2 H7 108.592
H6 Si2 H8 108.592 H7 Si2 H8 108.592
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.355      
2 Si 0.355      
3 H -0.118      
4 H -0.118      
5 H -0.118      
6 H -0.118      
7 H -0.118      
8 H -0.118      


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 -0.029 0.000 0.020 0.035


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.011 0.000 0.000
y 0.000 -32.011 0.000
z 0.000 0.000 -33.161
Traceless
 xyz
x 0.575 0.000 0.000
y 0.000 0.575 0.000
z 0.000 0.000 -1.150
Polar
3z2-r2-2.300
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 6.817 0.000 0.000
y 0.000 6.817 0.000
z 0.000 0.000 8.520


<r2> (average value of r2) Å2
<r2> 88.054
(<r2>)1/2 9.384