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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B3LYPultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B3LYPultrafine/6-31G*
 hartrees
Energy at 0K-582.582731
Energy at 298.15K-582.588548
HF Energy-582.582731
Nuclear repulsion energy90.436235
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 B3LYPultrafine/6-31G*
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 2238 2144 0.00      
2 A1g 930 891 0.00      
3 A1g 433 415 0.00      
4 A1u 130 124 0.00      
5 A2u 2228 2134 146.73      
6 A2u 855 819 528.26      
7 Eg 2240 2146 0.00      
7 Eg 2240 2146 0.00      
8 Eg 943 903 0.00      
8 Eg 943 903 0.00      
9 Eg 638 611 0.00      
9 Eg 638 611 0.00      
10 Eu 2250 2156 271.68      
10 Eu 2250 2156 271.70      
11 Eu 957 917 89.23      
11 Eu 957 917 89.23      
12 Eu 380 364 22.27      
12 Eu 380 364 22.27      

Unscaled Zero Point Vibrational Energy (zpe) 10814.7 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 10360.5 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 B3LYPultrafine/6-31G*
ABC
1.43477 0.16757 0.16757

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.175
Si2 0.000 0.000 -1.175
H3 0.000 1.394 1.699
H4 -1.207 -0.697 1.699
H5 1.207 -0.697 1.699
H6 0.000 -1.394 -1.699
H7 -1.207 0.697 -1.699
H8 1.207 0.697 -1.699

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35021.48921.48921.48923.19453.19453.1945
Si22.35023.19453.19453.19451.48921.48921.4892
H31.48923.19452.41432.41434.39563.67323.6732
H41.48923.19452.41432.41433.67323.67324.3956
H51.48923.19452.41432.41433.67324.39563.6732
H63.19451.48924.39563.67323.67322.41432.4143
H73.19451.48923.67323.67324.39562.41432.4143
H83.19451.48923.67324.39563.67322.41432.4143

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.606 Si1 Si2 H7 110.606
Si1 Si2 H8 110.606 Si2 Si1 H3 110.606
Si2 Si1 H4 110.606 Si2 Si1 H5 110.606
H3 Si1 H4 108.313 H3 Si1 H5 108.313
H4 Si1 H5 108.313 H6 Si2 H7 108.313
H6 Si2 H8 108.313 H7 Si2 H8 108.313
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.157      
2 Si 0.157      
3 H -0.052      
4 H -0.052      
5 H -0.052      
6 H -0.052      
7 H -0.052      
8 H -0.052      


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 -30.942 0.000 0.000
y 0.000 -30.942 0.000
z 0.000 0.000 -32.120
Traceless
 xyz
x 0.589 0.000 0.000
y 0.000 0.589 0.000
z 0.000 0.000 -1.178
Polar
3z2-r2-2.357
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 6.375 0.000 0.000
y 0.000 6.376 -0.000
z 0.000 -0.000 9.145


<r2> (average value of r2) Å2
<r2> 87.217
(<r2>)1/2 9.339