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All results from a given calculation for Si2H6 (disilane)

using model chemistry: TPSSh/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at TPSSh/TZVP
 hartrees
Energy at 0K-582.630191
Energy at 298.15K-582.636063
HF Energy-582.630191
Nuclear repulsion energy90.357445
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 TPSSh/TZVP
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 2226 2145 0.00      
2 A1g 929 895 0.00      
3 A1g 425 410 0.00      
4 A1u 143 138 0.00      
5 A2u 2218 2137 116.93      
6 A2u 854 823 519.04      
7 Eg 2228 2147 0.00      
7 Eg 2228 2147 0.00      
8 Eg 949 915 0.00      
8 Eg 949 915 0.00      
9 Eg 639 616 0.00      
9 Eg 639 616 0.00      
10 Eu 2237 2156 200.97      
10 Eu 2237 2156 201.05      
11 Eu 964 929 85.92      
11 Eu 964 929 85.95      
12 Eu 379 365 22.14      
12 Eu 379 365 22.15      

Unscaled Zero Point Vibrational Energy (zpe) 10792.2 cm-1
Scaled (by 0.9637) Zero Point Vibrational Energy (zpe) 10400.4 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 TPSSh/TZVP
ABC
1.43105 0.16719 0.16719

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/TZVP

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.177
Si2 0.000 0.000 -1.177
H3 0.000 1.396 1.697
H4 -1.209 -0.698 1.697
H5 1.209 -0.698 1.697
H6 0.000 -1.396 -1.697
H7 -1.209 0.698 -1.697
H8 1.209 0.698 -1.697

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35431.48921.48921.48923.19473.19473.1947
Si22.35433.19473.19473.19471.48921.48921.4892
H31.48923.19472.41752.41754.39373.66893.6689
H41.48923.19472.41752.41753.66893.66894.3937
H51.48923.19472.41752.41753.66894.39373.6689
H63.19471.48924.39373.66893.66892.41752.4175
H73.19471.48923.66893.66894.39372.41752.4175
H83.19471.48923.66894.39373.66892.41752.4175

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.410 Si1 Si2 H7 110.410
Si1 Si2 H8 110.410 Si2 Si1 H3 110.410
Si2 Si1 H4 110.410 Si2 Si1 H5 110.410
H3 Si1 H4 108.516 H3 Si1 H5 108.516
H4 Si1 H5 108.516 H6 Si2 H7 108.516
H6 Si2 H8 108.516 H7 Si2 H8 108.516
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.198      
2 Si 0.198      
3 H -0.066      
4 H -0.066      
5 H -0.066      
6 H -0.066      
7 H -0.066      
8 H -0.066      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.494 0.000 0.000
y 0.000 7.493 0.000
z 0.000 0.000 9.902


<r2> (average value of r2) Å2
<r2> 87.386
(<r2>)1/2 9.348