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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: wB97X-D/aug-cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-490.546088
Energy at 298.15K 
HF Energy-490.546088
Nuclear repulsion energy118.779199
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 wB97X-D/aug-cc-pV(T+d)Z
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 2270 2270 53.65 209.96 0.06 0.11
2 A1 989 989 119.36 4.03 0.72 0.83
3 A1 866 866 74.58 5.94 0.10 0.18
4 A1 317 317 17.41 0.41 0.71 0.83
5 A2 738 738 0.00 5.85 0.75 0.86
6 B1 2275 2275 140.73 30.43 0.75 0.86
7 B1 715 715 126.76 2.09 0.75 0.86
8 B2 976 976 295.36 0.02 0.75 0.86
9 B2 903 903 0.52 3.58 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5023.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5023.7 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 wB97X-D/aug-cc-pV(T+d)Z
ABC
0.82011 0.25701 0.21073

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.447
F2 0.000 1.283 -0.486
F3 0.000 -1.283 -0.486
H4 1.235 0.000 1.242
H5 -1.235 0.000 1.242

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58571.58571.46941.4694
F21.58572.56542.48132.4813
F31.58572.56542.48132.4813
H41.46942.48132.48132.4707
H51.46942.48132.48132.4707

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.976 F2 Si1 H4 108.563
F2 Si1 H5 108.563 F3 Si1 H4 108.563
F3 Si1 H5 108.563 H4 Si1 H5 114.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.389      
2 F -0.598      
3 F -0.598      
4 H -0.097      
5 H -0.097      


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 1.513 1.513
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.856 0.000 0.000
y 0.000 -26.240 0.000
z 0.000 0.000 -23.118
Traceless
 xyz
x 1.823 0.000 0.000
y 0.000 -3.253 0.000
z 0.000 0.000 1.430
Polar
3z2-r22.861
x2-y23.384
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.017 0.000 0.000
y 0.000 3.767 0.000
z 0.000 0.000 3.792


<r2> (average value of r2) Å2
<r2> 57.827
(<r2>)1/2 7.604