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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B97D3/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 B97D3/aug-cc-pVTZ
 hartrees
Energy at 0K-582.599190
Energy at 298.15K-582.604935
HF Energy-582.599190
Nuclear repulsion energy90.238904
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 B97D3/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 2156 2123 0.00      
2 A1g 897 883 0.00      
3 A1g 415 409 0.00      
4 A1u 126 124 0.00      
5 A2u 2148 2115 117.07      
6 A2u 827 815 470.21      
7 Eg 2162 2129 0.00      
7 Eg 2162 2129 0.00      
8 Eg 919 905 0.00      
8 Eg 919 905 0.00      
9 Eg 616 607 0.00      
9 Eg 616 607 0.00      
10 Eu 2172 2139 198.38      
10 Eu 2172 2139 198.39      
11 Eu 933 919 74.31      
11 Eu 933 919 74.30      
12 Eu 365 360 18.66      
12 Eu 365 359 18.67      

Unscaled Zero Point Vibrational Energy (zpe) 10452.1 cm-1
Scaled (by 0.9847) Zero Point Vibrational Energy (zpe) 10292.1 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 B97D3/aug-cc-pVTZ
ABC
1.42244 0.16699 0.16699

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/aug-cc-pVTZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.178
Si2 0.000 0.000 -1.178
H3 0.000 1.400 1.697
H4 -1.212 -0.700 1.697
H5 1.212 -0.700 1.697
H6 0.000 -1.400 -1.697
H7 -1.212 0.700 -1.697
H8 1.212 0.700 -1.697

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35541.49321.49321.49323.19763.19763.1976
Si22.35543.19763.19763.19761.49321.49321.4932
H31.49323.19762.42482.42484.40013.67173.6717
H41.49323.19762.42482.42483.67173.67174.4001
H51.49323.19762.42482.42483.67174.40013.6717
H63.19761.49324.40013.67173.67172.42482.4248
H73.19761.49323.67173.67174.40012.42482.4248
H83.19761.49323.67174.40013.67172.42482.4248

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.356 Si1 Si2 H7 110.356
Si1 Si2 H8 110.356 Si2 Si1 H3 110.356
Si2 Si1 H4 110.356 Si2 Si1 H5 110.356
H3 Si1 H4 108.572 H3 Si1 H5 108.572
H4 Si1 H5 108.572 H6 Si2 H7 108.572
H6 Si2 H8 108.572 H7 Si2 H8 108.572
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.532      
2 Si 0.532      
3 H -0.177      
4 H -0.177      
5 H -0.177      
6 H -0.177      
7 H -0.177      
8 H -0.177      


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 -31.382 0.000 0.000
y 0.000 -31.382 0.000
z 0.000 0.000 -32.273
Traceless
 xyz
x 0.446 0.000 0.000
y 0.000 0.446 0.000
z 0.000 0.000 -0.892
Polar
3z2-r2-1.783
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 8.640 0.000 0.000
y 0.000 8.640 -0.000
z 0.000 -0.000 11.595


<r2> (average value of r2) Å2
<r2> 87.664
(<r2>)1/2 9.363