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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: PBEPBE/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/6-311+G(3df,2p)
 hartrees
Energy at 0K-490.244522
Energy at 298.15K 
HF Energy-490.244522
Nuclear repulsion energy117.115800
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 PBEPBE/6-311+G(3df,2p)
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 2218 2200 49.08 209.40 0.08 0.14
2 A1 941 934 103.71 6.74 0.72 0.84
3 A1 813 806 65.24 7.96 0.10 0.18
4 A1 300 298 14.71 0.71 0.73 0.84
5 A2 695 689 0.00 8.43 0.75 0.86
6 B1 2235 2216 127.99 37.39 0.75 0.86
7 B1 676 671 104.28 3.62 0.75 0.86
8 B2 926 919 259.81 0.00 0.75 0.86
9 B2 852 845 1.40 5.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4827.9 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 4788.4 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 PBEPBE/6-311+G(3df,2p)
ABC
0.80390 0.24872 0.20451

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.452
F2 0.000 1.304 -0.490
F3 0.000 -1.304 -0.490
H4 1.252 0.000 1.247
H5 -1.252 0.000 1.247

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.60901.60901.48291.4829
F21.60902.60822.50722.5072
F31.60902.60822.50722.5072
H41.48292.50722.50722.5038
H51.48292.50722.50722.5038

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.290 F2 Si1 H4 108.297
F2 Si1 H5 108.297 F3 Si1 H4 108.297
F3 Si1 H5 108.297 H4 Si1 H5 115.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.897      
2 F -0.385      
3 F -0.385      
4 H -0.064      
5 H -0.064      


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 1.506 1.506
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.150 0.000 0.000
y 0.000 -26.469 0.000
z 0.000 0.000 -23.338
Traceless
 xyz
x 1.753 0.000 0.000
y 0.000 -3.225 0.000
z 0.000 0.000 1.471
Polar
3z2-r22.943
x2-y23.319
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.181 0.000 0.000
y 0.000 3.934 0.000
z 0.000 0.000 3.940


<r2> (average value of r2) Å2
<r2> 59.234
(<r2>)1/2 7.696