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All results from a given calculation for Si2H6 (disilane)

using model chemistry: BLYP/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at BLYP/aug-cc-pVTZ
 hartrees
Energy at 0K-582.573985
Energy at 298.15K-582.579723
HF Energy-582.573985
Nuclear repulsion energy89.978222
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 BLYP/aug-cc-pVTZ
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 2154 2146 0.00      
2 A1g 894 891 0.00      
3 A1g 407 405 0.00      
4 A1u 132 131 0.00      
5 A2u 2147 2139 114.33      
6 A2u 823 821 483.88      
7 Eg 2159 2152 0.00      
7 Eg 2159 2152 0.00      
8 Eg 918 915 0.00      
8 Eg 918 915 0.00      
9 Eg 612 610 0.00      
9 Eg 612 610 0.00      
10 Eu 2169 2162 190.12      
10 Eu 2169 2162 190.14      
11 Eu 931 928 75.04      
11 Eu 931 928 75.04      
12 Eu 365 363 19.20      
12 Eu 365 363 19.20      

Unscaled Zero Point Vibrational Energy (zpe) 10431.8 cm-1
Scaled (by 0.9966) Zero Point Vibrational Energy (zpe) 10396.3 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 BLYP/aug-cc-pVTZ
ABC
1.42400 0.16556 0.16556

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/aug-cc-pVTZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.183
Si2 0.000 0.000 -1.183
H3 0.000 1.399 1.705
H4 -1.212 -0.700 1.705
H5 1.212 -0.700 1.705
H6 0.000 -1.399 -1.705
H7 -1.212 0.700 -1.705
H8 1.212 0.700 -1.705

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.36611.49351.49351.49353.20953.20953.2095
Si22.36613.20953.20953.20951.49351.49351.4935
H31.49353.20952.42352.42354.41193.68663.6866
H41.49353.20952.42352.42353.68663.68664.4119
H51.49353.20952.42352.42353.68664.41193.6866
H63.20951.49354.41193.68663.68662.42352.4235
H73.20951.49353.68663.68664.41192.42352.4235
H83.20951.49353.68664.41193.68662.42352.4235

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.471 Si1 Si2 H7 110.471
Si1 Si2 H8 110.471 Si2 Si1 H3 110.471
Si2 Si1 H4 110.471 Si2 Si1 H5 110.471
H3 Si1 H4 108.453 H3 Si1 H5 108.453
H4 Si1 H5 108.453 H6 Si2 H7 108.453
H6 Si2 H8 108.453 H7 Si2 H8 108.453
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.656      
2 Si 0.656      
3 H -0.219      
4 H -0.219      
5 H -0.219      
6 H -0.219      
7 H -0.219      
8 H -0.219      


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 -31.705 0.000 0.000
y 0.000 -31.705 0.000
z 0.000 0.000 -32.659
Traceless
 xyz
x 0.477 0.000 0.000
y 0.000 0.477 0.000
z 0.000 0.000 -0.954
Polar
3z2-r2-1.908
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 8.729 0.000 0.000
y 0.000 8.729 0.000
z 0.000 0.000 11.829


<r2> (average value of r2) Å2
<r2> 88.388
(<r2>)1/2 9.401