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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B1B95/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 B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-582.633697
Energy at 298.15K-582.639545
HF Energy-582.633697
Nuclear repulsion energy90.940722
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/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 2228 2136 0.00      
2 A1g 913 875 0.00      
3 A1g 433 415 0.00      
4 A1u 146 140 0.00      
5 A2u 2220 2128 108.76      
6 A2u 838 803 482.47      
7 Eg 2231 2139 0.00      
7 Eg 2231 2139 0.00      
8 Eg 935 896 0.00      
8 Eg 935 896 0.00      
9 Eg 627 601 0.00      
9 Eg 627 601 0.00      
10 Eu 2241 2148 184.67      
10 Eu 2241 2148 184.71      
11 Eu 948 909 76.23      
11 Eu 948 909 76.24      
12 Eu 374 359 19.22      
12 Eu 374 358 19.21      

Unscaled Zero Point Vibrational Energy (zpe) 10746.2 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 10300.2 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/aug-cc-pVTZ
ABC
1.44057 0.16984 0.16984

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVTZ

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 1.391 1.684
H4 -1.205 -0.696 1.684
H5 1.205 -0.696 1.684
H6 0.000 -1.391 -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
Si12.33491.48391.48391.48393.17263.17263.1726
Si22.33493.17263.17263.17261.48391.48391.4839
H31.48393.17262.40952.40954.36843.64383.6438
H41.48393.17262.40952.40953.64383.64384.3684
H51.48393.17262.40952.40953.64384.36843.6438
H63.17261.48394.36843.64383.64382.40952.4095
H73.17261.48393.64383.64384.36842.40952.4095
H83.17261.48393.64384.36843.64382.40952.4095

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.367 Si1 Si2 H7 110.367
Si1 Si2 H8 110.367 Si2 Si1 H3 110.367
Si2 Si1 H4 110.367 Si2 Si1 H5 110.367
H3 Si1 H4 108.560 H3 Si1 H5 108.560
H4 Si1 H5 108.560 H6 Si2 H7 108.560
H6 Si2 H8 108.560 H7 Si2 H8 108.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.367      
2 Si 0.367      
3 H -0.122      
4 H -0.122      
5 H -0.122      
6 H -0.122      
7 H -0.122      
8 H -0.122      


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 -31.120 0.000 0.000
y 0.000 -31.120 0.000
z 0.000 0.000 -31.974
Traceless
 xyz
x 0.427 0.000 0.000
y 0.000 0.427 0.000
z 0.000 0.000 -0.854
Polar
3z2-r2-1.707
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 8.353 0.000 0.000
y 0.000 8.353 0.000
z 0.000 0.000 11.143


<r2> (average value of r2) Å2
<r2> 86.400
(<r2>)1/2 9.295