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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B3LYP/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B3LYP/6-311G**
 hartrees
Energy at 0K-582.638359
Energy at 298.15K-582.644214
HF Energy-582.638359
Nuclear repulsion energy90.410442
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 B3LYP/6-311G**
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 2219 2145 0.00      
2 A1g 928 897 0.00      
3 A1g 423 409 0.00      
4 A1u 135 131 0.00      
5 A2u 2210 2137 121.90      
6 A2u 855 826 544.97      
7 Eg 2220 2146 0.00      
7 Eg 2220 2146 0.00      
8 Eg 946 914 0.00      
8 Eg 946 914 0.00      
9 Eg 637 616 0.00      
9 Eg 637 616 0.00      
10 Eu 2230 2156 208.39      
10 Eu 2230 2156 208.42      
11 Eu 960 928 91.97      
11 Eu 960 928 91.97      
12 Eu 381 368 26.55      
12 Eu 381 368 26.55      

Unscaled Zero Point Vibrational Energy (zpe) 10756.9 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 10399.8 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 B3LYP/6-311G**
ABC
1.43467 0.16724 0.16724

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.177
Si2 0.000 0.000 -1.177
H3 0.000 1.394 1.695
H4 -1.207 -0.697 1.695
H5 1.207 -0.697 1.695
H6 0.000 -1.394 -1.695
H7 -1.207 0.697 -1.695
H8 1.207 0.697 -1.695

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35461.48701.48701.48703.19253.19253.1925
Si22.35463.19253.19253.19251.48701.48701.4870
H31.48703.19252.41442.41444.38893.66523.6652
H41.48703.19252.41442.41443.66523.66524.3889
H51.48703.19252.41442.41443.66524.38893.6652
H63.19251.48704.38893.66523.66522.41442.4144
H73.19251.48703.66523.66524.38892.41442.4144
H83.19251.48703.66524.38893.66522.41442.4144

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.370 Si1 Si2 H7 110.370
Si1 Si2 H8 110.370 Si2 Si1 H3 110.370
Si2 Si1 H4 110.370 Si2 Si1 H5 110.370
H3 Si1 H4 108.558 H3 Si1 H5 108.558
H4 Si1 H5 108.558 H6 Si2 H7 108.558
H6 Si2 H8 108.558 H7 Si2 H8 108.558
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.342      
2 Si 0.342      
3 H -0.114      
4 H -0.114      
5 H -0.114      
6 H -0.114      
7 H -0.114      
8 H -0.114      


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 -31.527 0.000 0.000
y 0.000 -31.527 0.000
z 0.000 0.000 -32.548
Traceless
 xyz
x 0.510 0.000 0.000
y 0.000 0.510 0.000
z 0.000 0.000 -1.021
Polar
3z2-r2-2.041
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 7.525 0.000 0.000
y 0.000 7.525 -0.000
z 0.000 -0.000 9.925


<r2> (average value of r2) Å2
<r2> 87.605
(<r2>)1/2 9.360