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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3LYPultrafine/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/6-31G**
 hartrees
Energy at 0K-490.491927
Energy at 298.15K 
HF Energy-490.491927
Nuclear repulsion energy117.681814
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/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2294 2204 70.27 141.83 0.11 0.19
2 A1 996 957 164.43 18.05 0.60 0.75
3 A1 874 839 42.76 5.40 0.22 0.36
4 A1 317 304 17.09 0.73 0.74 0.85
5 A2 746 717 0.00 13.62 0.75 0.86
6 B1 2303 2213 195.59 38.65 0.75 0.86
7 B1 725 697 137.14 5.06 0.75 0.86
8 B2 1035 995 308.83 1.94 0.75 0.86
9 B2 916 880 0.17 8.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5103.3 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 4903.3 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 B3LYPultrafine/6-31G**
ABC
0.80888 0.25169 0.20644

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.449
F2 0.000 1.297 -0.489
F3 0.000 -1.297 -0.489
H4 1.236 0.000 1.259
H5 -1.236 0.000 1.259

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.60091.60091.47741.4774
F21.60092.59362.50302.5030
F31.60092.59362.50302.5030
H41.47742.50302.50302.4719
H51.47742.50302.50302.4719

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.203 F2 Si1 H4 108.737
F2 Si1 H5 108.737 F3 Si1 H4 108.737
F3 Si1 H5 108.737 H4 Si1 H5 113.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.995      
2 F -0.373      
3 F -0.373      
4 H -0.125      
5 H -0.125      


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 1.465 1.465
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.630 0.000 0.000
y 0.000 -25.690 0.000
z 0.000 0.000 -22.644
Traceless
 xyz
x 1.537 0.000 0.000
y 0.000 -3.054 0.000
z 0.000 0.000 1.516
Polar
3z2-r23.033
x2-y23.061
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.079 0.000 0.000
y 0.000 2.702 0.000
z 0.000 0.000 2.846


<r2> (average value of r2) Å2
<r2> 58.405
(<r2>)1/2 7.642