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All results from a given calculation for Si2H6 (disilane)

using model chemistry: HSEh1PBE/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at HSEh1PBE/Def2TZVPP
 hartrees
Energy at 0K-582.369229
Energy at 298.15K-582.375023
HF Energy-582.369229
Nuclear repulsion energy90.751477
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 HSEh1PBE/Def2TZVPP
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 2213 2213 0.00      
2 A1g 910 910 0.00      
3 A1g 431 431 0.00      
4 A1u 140 140 0.00      
5 A2u 2206 2206 104.62      
6 A2u 837 837 473.74      
7 Eg 2216 2216 0.00      
7 Eg 2216 2216 0.00      
8 Eg 933 933 0.00      
8 Eg 933 933 0.00      
9 Eg 626 626 0.00      
9 Eg 626 626 0.00      
10 Eu 2226 2226 172.84      
10 Eu 2226 2226 172.89      
11 Eu 947 947 76.00      
11 Eu 947 947 76.03      
12 Eu 364 364 17.77      
12 Eu 364 364 17.78      

Unscaled Zero Point Vibrational Energy (zpe) 10677.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10677.8 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 HSEh1PBE/Def2TZVPP
ABC
1.43382 0.16913 0.16913

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/Def2TZVPP

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 1.394 1.686
H4 -1.208 -0.697 1.686
H5 1.208 -0.697 1.686
H6 0.000 -1.394 -1.686
H7 -1.208 0.697 -1.686
H8 1.208 0.697 -1.686

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.34001.48691.48691.48693.17853.17853.1785
Si22.34003.17853.17853.17851.48691.48691.4869
H31.48693.17852.41512.41514.37623.64943.6494
H41.48693.17852.41512.41513.64943.64944.3762
H51.48693.17852.41512.41513.64944.37623.6494
H63.17851.48694.37623.64943.64942.41512.4151
H73.17851.48693.64943.64944.37622.41512.4151
H83.17851.48693.64944.37623.64942.41512.4151

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.316 Si1 Si2 H7 110.316
Si1 Si2 H8 110.316 Si2 Si1 H3 110.316
Si2 Si1 H4 110.316 Si2 Si1 H5 110.316
H3 Si1 H4 108.614 H3 Si1 H5 108.614
H4 Si1 H5 108.614 H6 Si2 H7 108.614
H6 Si2 H8 108.614 H7 Si2 H8 108.614
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.119      
2 Si 0.119      
3 H -0.040      
4 H -0.040      
5 H -0.040      
6 H -0.040      
7 H -0.040      
8 H -0.040      


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 -31.167 0.000 0.000
y 0.000 -31.167 0.000
z 0.000 0.000 -32.021
Traceless
 xyz
x 0.427 0.000 0.000
y 0.000 0.427 0.000
z 0.000 0.000 -0.854
Polar
3z2-r2-1.708
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 7.983 0.000 0.000
y 0.000 7.983 0.000
z 0.000 0.000 10.677


<r2> (average value of r2) Å2
<r2> 86.701
(<r2>)1/2 9.311