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All results from a given calculation for Si2H6 (disilane)

using model chemistry: wB97X-D/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-11.356065
Energy at 298.15K-11.361962
HF Energy-11.356065
Nuclear repulsion energy18.740334
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/LANL2DZ
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 2270 2270 0.00      
2 A1g 896 896 0.00      
3 A1g 435 435 0.00      
4 A1u 170 170 0.00      
5 A2u 2259 2259 139.05      
6 A2u 840 840 408.61      
7 Eg 2281 2281 0.00      
7 Eg 2281 2281 0.00      
8 Eg 961 961 0.00      
8 Eg 961 961 0.00      
9 Eg 639 639 0.00      
9 Eg 639 639 0.00      
10 Eu 2289 2289 196.96      
10 Eu 2289 2289 198.65      
11 Eu 971 971 76.02      
11 Eu 971 971 75.95      
12 Eu 383 383 16.69      
12 Eu 383 383 16.81      

Unscaled Zero Point Vibrational Energy (zpe) 10958.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10958.3 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 wB97X-D/LANL2DZ
ABC
1.43964 0.17005 0.17005

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/LANL2DZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.167
Si2 0.000 0.000 -1.167
H3 0.000 1.392 1.684
H4 -1.205 -0.696 1.684
H5 1.205 -0.696 1.684
H6 0.000 -1.392 -1.684
H7 -1.205 0.696 -1.684
H8 1.205 0.696 -1.684

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.33301.48461.48461.48463.17183.17183.1718
Si22.33303.17183.17183.17181.48461.48461.4846
H31.48463.17182.41032.41034.36863.64363.6436
H41.48463.17182.41032.41033.64363.64364.3686
H51.48463.17182.41032.41033.64364.36863.6436
H63.17181.48464.36863.64363.64362.41032.4103
H73.17181.48463.64363.64364.36862.41032.4103
H83.17181.48463.64364.36863.64362.41032.4103

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.387 Si1 Si2 H7 110.387
Si1 Si2 H8 110.387 Si2 Si1 H3 110.387
Si2 Si1 H4 110.387 Si2 Si1 H5 110.387
H3 Si1 H4 108.540 H3 Si1 H5 108.540
H4 Si1 H5 108.540 H6 Si2 H7 108.540
H6 Si2 H8 108.540 H7 Si2 H8 108.540
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.240      
2 Si 0.240      
3 H -0.080      
4 H -0.080      
5 H -0.080      
6 H -0.080      
7 H -0.080      
8 H -0.080      


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 -28.863 0.000 0.000
y 0.000 -28.863 0.000
z 0.000 0.000 -29.685
Traceless
 xyz
x 0.411 0.000 0.000
y 0.000 0.411 0.000
z 0.000 0.000 -0.822
Polar
3z2-r2-1.645
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 5.985 0.000 0.000
y 0.000 6.035 0.008
z 0.000 0.008 8.432


<r2> (average value of r2) Å2
<r2> 57.712
(<r2>)1/2 7.597