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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: HSEh1PBE/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 HSEh1PBE/cc-pVDZ
 hartrees
Energy at 0K-490.202064
Energy at 298.15K 
HF Energy-490.202064
Nuclear repulsion energy115.518328
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 HSEh1PBE/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 A1 2272 2185 47.77 182.11 0.11 0.21
2 A1 950 914 132.20 12.37 0.66 0.79
3 A1 844 812 46.77 5.06 0.22 0.35
4 A1 297 286 19.24 0.83 0.74 0.85
5 A2 712 685 0.00 16.56 0.75 0.86
6 B1 2291 2204 134.55 40.01 0.75 0.86
7 B1 691 665 127.08 6.54 0.75 0.86
8 B2 983 946 264.89 0.90 0.75 0.86
9 B2 876 843 0.68 8.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4958.3 cm-1
Scaled (by 0.9619) Zero Point Vibrational Energy (zpe) 4769.4 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 HSEh1PBE/cc-pVDZ
ABC
0.77422 0.24324 0.19902

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.465
F2 0.000 1.319 -0.501
F3 0.000 -1.319 -0.501
H4 1.258 0.000 1.255
H5 -1.258 0.000 1.255

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.63511.63511.48531.4853
F21.63512.63822.53102.5310
F31.63512.63822.53102.5310
H41.48532.53102.53102.5154
H51.48532.53102.53102.5154

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.563 F2 Si1 H4 108.318
F2 Si1 H5 108.318 F3 Si1 H4 108.318
F3 Si1 H5 108.318 H4 Si1 H5 115.729
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.792      
2 F -0.322      
3 F -0.322      
4 H -0.074      
5 H -0.074      


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 1.808 1.808
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.628 0.000 0.000
y 0.000 -26.433 0.000
z 0.000 0.000 -22.766
Traceless
 xyz
x 1.971 0.000 0.000
y 0.000 -3.735 0.000
z 0.000 0.000 1.765
Polar
3z2-r23.529
x2-y23.804
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.395 0.000 0.000
y 0.000 2.902 0.000
z 0.000 0.000 3.042


<r2> (average value of r2) Å2
<r2> 60.136
(<r2>)1/2 7.755