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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: BLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/Def2TZVPP
 hartrees
Energy at 0K-490.590653
Energy at 298.15K 
HF Energy-490.590653
Nuclear repulsion energy117.153790
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 BLYP/Def2TZVPP
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 2224 2224 53.44 195.04 0.09 0.16
2 A1 960 960 113.42 8.91 0.71 0.83
3 A1 820 820 67.29 5.94 0.13 0.23
4 A1 303 303 15.35 0.77 0.73 0.84
5 A2 709 709 0.00 10.77 0.75 0.86
6 B1 2239 2239 146.49 37.03 0.75 0.86
7 B1 689 689 116.04 4.59 0.75 0.86
8 B2 942 942 273.13 0.40 0.75 0.86
9 B2 863 863 4.88 6.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4874.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4874.3 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 BLYP/Def2TZVPP
ABC
0.80378 0.24901 0.20451

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.453
F2 0.000 1.304 -0.491
F3 0.000 -1.304 -0.491
H4 1.245 0.000 1.249
H5 -1.245 0.000 1.249

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.60921.60921.47761.4776
F21.60922.60732.50512.5051
F31.60922.60732.50512.5051
H41.47762.50512.50512.4893
H51.47762.50512.50512.4893

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.218 F2 Si1 H4 108.420
F2 Si1 H5 108.420 F3 Si1 H4 108.420
F3 Si1 H5 108.420 H4 Si1 H5 114.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.740      
2 F -0.294      
3 F -0.294      
4 H -0.076      
5 H -0.076      


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 1.477 1.477
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.277 0.000 0.000
y 0.000 -26.455 0.000
z 0.000 0.000 -23.381
Traceless
 xyz
x 1.641 0.000 0.000
y 0.000 -3.126 0.000
z 0.000 0.000 1.486
Polar
3z2-r22.971
x2-y23.178
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.903 0.000 0.000
y 0.000 3.580 0.000
z 0.000 0.000 3.641


<r2> (average value of r2) Å2
<r2> 59.235
(<r2>)1/2 7.696