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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B1B95/cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B1B95/cc-pV(T+d)Z
 hartrees
Energy at 0K-582.637314
Energy at 298.15K-582.643172
HF Energy-582.637314
Nuclear repulsion energy91.085773
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 B1B95/cc-pV(T+d)Z
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 2230 2135 0.00      
2 A1g 917 878 0.00      
3 A1g 434 416 0.00      
4 A1u 146 140 0.00      
5 A2u 2222 2128 109.35      
6 A2u 843 807 490.66      
7 Eg 2231 2136 0.00      
7 Eg 2231 2136 0.00      
8 Eg 938 898 0.00      
8 Eg 938 898 0.00      
9 Eg 630 603 0.00      
9 Eg 630 603 0.00      
10 Eu 2241 2145 182.42      
10 Eu 2241 2145 182.45      
11 Eu 952 911 78.70      
11 Eu 952 911 78.71      
12 Eu 375 359 18.73      
12 Eu 375 359 18.73      

Unscaled Zero Point Vibrational Energy (zpe) 10762.8 cm-1
Scaled (by 0.9573) Zero Point Vibrational Energy (zpe) 10303.2 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 B1B95/cc-pV(T+d)Z
ABC
1.44573 0.17034 0.17034

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pV(T+d)Z

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.166
Si2 0.000 0.000 -1.166
H3 0.000 1.389 1.681
H4 -1.203 -0.694 1.681
H5 1.203 -0.694 1.681
H6 0.000 -1.389 -1.681
H7 -1.203 0.694 -1.681
H8 1.203 0.694 -1.681

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.33161.48121.48121.48123.16753.16753.1675
Si22.33163.16753.16753.16751.48121.48121.4812
H31.48123.16752.40522.40524.36093.63763.6376
H41.48123.16752.40522.40523.63763.63764.3609
H51.48123.16752.40522.40523.63764.36093.6376
H63.16751.48124.36093.63763.63762.40522.4052
H73.16751.48123.63763.63764.36092.40522.4052
H83.16751.48123.63764.36093.63762.40522.4052

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.359 Si1 Si2 H7 110.359
Si1 Si2 H8 110.359 Si2 Si1 H3 110.359
Si2 Si1 H4 110.359 Si2 Si1 H5 110.359
H3 Si1 H4 108.569 H3 Si1 H5 108.569
H4 Si1 H5 108.569 H6 Si2 H7 108.569
H6 Si2 H8 108.569 H7 Si2 H8 108.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.090      
2 Si 0.090      
3 H -0.030      
4 H -0.030      
5 H -0.030      
6 H -0.030      
7 H -0.030      
8 H -0.030      


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 -31.121 0.000 0.000
y 0.000 -31.121 0.000
z 0.000 0.000 -31.986
Traceless
 xyz
x 0.432 0.000 0.000
y 0.000 0.432 0.000
z 0.000 0.000 -0.865
Polar
3z2-r2-1.729
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 7.925 0.000 0.000
y 0.000 7.924 0.000
z 0.000 0.000 10.567


<r2> (average value of r2) Å2
<r2> 86.198
(<r2>)1/2 9.284