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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B97D3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B97D3/6-31+G**
 hartrees
Energy at 0K-582.543990
Energy at 298.15K-582.549798
HF Energy-582.543990
Nuclear repulsion energy90.203851
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 B97D3/6-31+G**
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 2177 2140 0.00      
2 A1g 907 891 0.00      
3 A1g 424 416 0.00      
4 A1u 142 140 0.00      
5 A2u 2168 2131 153.32      
6 A2u 837 823 508.49      
7 Eg 2182 2144 0.00      
7 Eg 2182 2144 0.00      
8 Eg 926 910 0.00      
8 Eg 926 910 0.00      
9 Eg 626 616 0.00      
9 Eg 626 616 0.00      
10 Eu 2193 2155 262.85      
10 Eu 2193 2155 262.83      
11 Eu 940 924 78.76      
11 Eu 940 924 78.75      
12 Eu 379 372 22.48      
12 Eu 379 372 22.49      

Unscaled Zero Point Vibrational Energy (zpe) 10573.2 cm-1
Scaled (by 0.9828) Zero Point Vibrational Energy (zpe) 10391.4 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 B97D3/6-31+G**
ABC
1.42013 0.16694 0.16694

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31+G**

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 1.401 1.698
H4 -1.213 -0.701 1.698
H5 1.213 -0.701 1.698
H6 0.000 -1.401 -1.698
H7 -1.213 0.701 -1.698
H8 1.213 0.701 -1.698

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35541.49461.49461.49463.19903.19903.1990
Si22.35543.19903.19903.19901.49461.49461.4946
H31.49463.19902.42682.42684.40303.67393.6739
H41.49463.19902.42682.42683.67393.67394.4030
H51.49463.19902.42682.42683.67394.40303.6739
H63.19901.49464.40303.67393.67392.42682.4268
H73.19901.49463.67393.67394.40302.42682.4268
H83.19901.49463.67394.40303.67392.42682.4268

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.377 Si1 Si2 H7 110.377
Si1 Si2 H8 110.377 Si2 Si1 H3 110.377
Si2 Si1 H4 110.377 Si2 Si1 H5 110.377
H3 Si1 H4 108.550 H3 Si1 H5 108.550
H4 Si1 H5 108.550 H6 Si2 H7 108.550
H6 Si2 H8 108.550 H7 Si2 H8 108.550
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.232      
2 Si 0.232      
3 H -0.077      
4 H -0.077      
5 H -0.077      
6 H -0.077      
7 H -0.077      
8 H -0.077      


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 -31.333 0.000 0.000
y 0.000 -31.333 0.000
z 0.000 0.000 -32.515
Traceless
 xyz
x 0.591 0.000 0.000
y 0.000 0.591 0.000
z 0.000 0.000 -1.182
Polar
3z2-r2-2.365
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 7.400 0.000 0.000
y 0.000 7.399 -0.000
z 0.000 -0.000 10.155


<r2> (average value of r2) Å2
<r2> 87.731
(<r2>)1/2 9.366