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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: TPSSh/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/aug-cc-pVDZ
 hartrees
Energy at 0K-490.526166
Energy at 298.15K 
HF Energy-490.526166
Nuclear repulsion energy115.431956
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 TPSSh/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 2294 2219 46.98 216.74 0.07 0.12
2 A1 961 929 107.73 5.33 0.72 0.83
3 A1 815 789 71.89 8.38 0.09 0.16
4 A1 285 275 15.90 0.66 0.72 0.84
5 A2 710 687 0.00 6.80 0.75 0.86
6 B1 2314 2238 114.03 35.26 0.75 0.86
7 B1 686 664 107.13 2.62 0.75 0.86
8 B2 931 901 264.10 0.00 0.75 0.86
9 B2 860 832 13.11 4.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4927.2 cm-1
Scaled (by 0.9673) Zero Point Vibrational Energy (zpe) 4766.1 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 TPSSh/aug-cc-pVDZ
ABC
0.76779 0.24374 0.19884

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.469
F2 0.000 1.318 -0.504
F3 0.000 -1.318 -0.504
H4 1.254 0.000 1.254
H5 -1.254 0.000 1.254

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.63801.63801.47921.4792
F21.63802.63582.52952.5295
F31.63802.63582.52952.5295
H41.47922.52952.52952.5074
H51.47922.52952.52952.5074

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.134 F2 Si1 H4 108.373
F2 Si1 H5 108.373 F3 Si1 H4 108.373
F3 Si1 H5 108.373 H4 Si1 H5 115.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.890      
2 F -0.548      
3 F -0.548      
4 H 0.103      
5 H 0.103      


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 1.858 1.858
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.083 0.000 0.000
y 0.000 3.956 0.000
z 0.000 0.000 3.939


<r2> (average value of r2) Å2
<r2> 60.393
(<r2>)1/2 7.771