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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3LYPultrafine/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/cc-pVTZ
 hartrees
Energy at 0K-490.616320
Energy at 298.15K 
HF Energy-490.616320
Nuclear repulsion energy117.820263
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 B3LYPultrafine/cc-pVTZ
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 2286 2210 54.37 191.85 0.09 0.16
2 A1 980 947 122.44 7.90 0.71 0.83
3 A1 853 824 68.53 4.85 0.15 0.26
4 A1 312 302 16.95 0.59 0.73 0.85
5 A2 727 703 0.00 10.56 0.75 0.86
6 B1 2299 2222 147.78 35.02 0.75 0.86
7 B1 710 686 130.35 4.30 0.75 0.86
8 B2 971 938 286.72 0.30 0.75 0.86
9 B2 893 863 0.66 5.63 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5014.0 cm-1
Scaled (by 0.9667) Zero Point Vibrational Energy (zpe) 4847.0 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 B3LYPultrafine/cc-pVTZ
ABC
0.80580 0.25304 0.20724

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.453
F2 0.000 1.293 -0.490
F3 0.000 -1.293 -0.490
H4 1.240 0.000 1.246
H5 -1.240 0.000 1.246

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.60031.60031.47191.4719
F21.60032.58592.49472.4947
F31.60032.58592.49472.4947
H41.47192.49472.49472.4799
H51.47192.49472.49472.4799

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.791 F2 Si1 H4 108.514
F2 Si1 H5 108.514 F3 Si1 H4 108.514
F3 Si1 H5 108.514 H4 Si1 H5 114.788
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.679      
2 F -0.281      
3 F -0.281      
4 H -0.058      
5 H -0.058      


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 1.509 1.509
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.048 0.000 0.000
y 0.000 -26.187 0.000
z 0.000 0.000 -23.150
Traceless
 xyz
x 1.620 0.000 0.000
y 0.000 -3.087 0.000
z 0.000 0.000 1.467
Polar
3z2-r22.934
x2-y23.138
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.727 0.000 0.000
y 0.000 3.293 0.000
z 0.000 0.000 3.393


<r2> (average value of r2) Å2
<r2> 58.538
(<r2>)1/2 7.651