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All results from a given calculation for Si2H6 (disilane)

using model chemistry: wB97X-D/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 wB97X-D/6-31G*
 hartrees
Energy at 0K-582.533301
Energy at 298.15K-582.539198
HF Energy-582.533301
Nuclear repulsion energy90.827247
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 wB97X-D/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 2234 2119 0.00      
2 A1g 936 888 0.00      
3 A1g 450 427 0.00      
4 A1u 146 138 0.00      
5 A2u 2223 2109 156.91      
6 A2u 861 816 524.77      
7 Eg 2230 2115 0.00      
7 Eg 2230 2115 0.00      
8 Eg 952 903 0.00      
8 Eg 952 903 0.00      
9 Eg 647 613 0.00      
9 Eg 647 613 0.00      
10 Eu 2240 2124 284.47      
10 Eu 2240 2124 284.50      
11 Eu 966 917 91.82      
11 Eu 966 917 91.98      
12 Eu 390 370 24.56      
12 Eu 390 370 24.51      

Unscaled Zero Point Vibrational Energy (zpe) 10849.5 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 10290.7 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 wB97X-D/6-31G*
ABC
1.43815 0.16941 0.16941

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.170
Si2 0.000 0.000 -1.170
H3 0.000 1.393 1.689
H4 -1.207 -0.697 1.689
H5 1.207 -0.697 1.689
H6 0.000 -1.393 -1.689
H7 -1.207 0.697 -1.689
H8 1.207 0.697 -1.689

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.33911.48691.48691.48693.18013.18013.1801
Si22.33913.18013.18013.18011.48691.48691.4869
H31.48693.18012.41312.41314.37903.65413.6541
H41.48693.18012.41312.41313.65413.65414.3790
H51.48693.18012.41312.41313.65414.37903.6541
H63.18011.48694.37903.65413.65412.41312.4131
H73.18011.48693.65413.65414.37902.41312.4131
H83.18011.48693.65414.37903.65412.41312.4131

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.449 Si1 Si2 H7 110.449
Si1 Si2 H8 110.449 Si2 Si1 H3 110.449
Si2 Si1 H4 110.449 Si2 Si1 H5 110.449
H3 Si1 H4 108.476 H3 Si1 H5 108.476
H4 Si1 H5 108.476 H6 Si2 H7 108.476
H6 Si2 H8 108.476 H7 Si2 H8 108.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.167      
2 Si 0.167      
3 H -0.056      
4 H -0.056      
5 H -0.056      
6 H -0.056      
7 H -0.056      
8 H -0.056      


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 -30.812 0.000 0.000
y 0.000 -30.812 0.000
z 0.000 0.000 -31.929
Traceless
 xyz
x 0.559 0.000 0.000
y 0.000 0.559 0.000
z 0.000 0.000 -1.117
Polar
3z2-r2-2.235
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 6.361 0.000 0.000
y 0.000 6.366 -0.001
z 0.000 -0.001 8.860


<r2> (average value of r2) Å2
<r2> 86.455
(<r2>)1/2 9.298