return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for Si2H6 (disilane)

using model chemistry: B3LYPultrafine/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B3LYPultrafine/cc-pVDZ
 hartrees
Energy at 0K-582.611545
Energy at 298.15K-582.617341
HF Energy-582.611545
Nuclear repulsion energy90.005191
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 B3LYPultrafine/cc-pVDZ
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 2189 2123 0.00      
2 A1g 913 885 0.00      
3 A1g 420 407 0.00      
4 A1u 131 127 0.00      
5 A2u 2181 2115 116.87      
6 A2u 841 816 482.31      
7 Eg 2193 2127 0.00      
7 Eg 2193 2127 0.00      
8 Eg 936 908 0.00      
8 Eg 936 908 0.00      
9 Eg 628 609 0.00      
9 Eg 628 609 0.00      
10 Eu 2202 2136 190.66      
10 Eu 2202 2136 190.68      
11 Eu 950 921 78.58      
11 Eu 950 921 78.58      
12 Eu 370 359 18.23      
12 Eu 370 359 18.24      

Unscaled Zero Point Vibrational Energy (zpe) 10615.2 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 10296.8 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 B3LYPultrafine/cc-pVDZ
ABC
1.41362 0.16618 0.16618

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/cc-pVDZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.181
Si2 0.000 0.000 -1.181
H3 0.000 1.404 1.701
H4 -1.216 -0.702 1.701
H5 1.216 -0.702 1.701
H6 0.000 -1.404 -1.701
H7 -1.216 0.702 -1.701
H8 1.216 0.702 -1.701

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.36121.49751.49751.49753.20533.20533.2053
Si22.36123.20533.20533.20531.49751.49751.4975
H31.49753.20532.43232.43234.41113.67993.6799
H41.49753.20532.43232.43233.67993.67994.4111
H51.49753.20532.43232.43233.67994.41113.6799
H63.20531.49754.41113.67993.67992.43232.4323
H73.20531.49753.67993.67994.41112.43232.4323
H83.20531.49753.67994.41113.67992.43232.4323

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.323 Si1 Si2 H7 110.323
Si1 Si2 H8 110.323 Si2 Si1 H3 110.323
Si2 Si1 H4 110.323 Si2 Si1 H5 110.323
H3 Si1 H4 108.606 H3 Si1 H5 108.606
H4 Si1 H5 108.606 H6 Si2 H7 108.606
H6 Si2 H8 108.606 H7 Si2 H8 108.606
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.163      
2 Si 0.163      
3 H -0.054      
4 H -0.054      
5 H -0.054      
6 H -0.054      
7 H -0.054      
8 H -0.054      


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 -31.270 0.000 0.000
y 0.000 -31.270 0.000
z 0.000 0.000 -32.286
Traceless
 xyz
x 0.508 0.000 0.000
y 0.000 0.508 0.000
z 0.000 0.000 -1.016
Polar
3z2-r2-2.031
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 7.488 0.000 0.000
y 0.000 7.488 0.000
z 0.000 0.000 10.008


<r2> (average value of r2) Å2
<r2> 87.956
(<r2>)1/2 9.378