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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: BLYP/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 BLYP/cc-pVTZ
 hartrees
Energy at 0K-490.572693
Energy at 298.15K 
HF Energy-490.572693
Nuclear repulsion energy116.586176
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/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 2221 2214 54.08 200.27 0.09 0.17
2 A1 952 950 112.35 8.97 0.71 0.83
3 A1 816 813 63.32 5.89 0.13 0.23
4 A1 300 299 14.89 0.73 0.73 0.85
5 A2 706 704 0.00 11.83 0.75 0.86
6 B1 2237 2231 149.27 38.28 0.75 0.86
7 B1 688 686 116.10 5.05 0.75 0.86
8 B2 939 937 262.71 0.52 0.75 0.86
9 B2 859 857 3.93 6.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4859.2 cm-1
Scaled (by 0.997) Zero Point Vibrational Energy (zpe) 4844.7 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 BLYP/cc-pVTZ
ABC
0.79356 0.24699 0.20258

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.457
F2 0.000 1.309 -0.494
F3 0.000 -1.309 -0.494
H4 1.248 0.000 1.253
H5 -1.248 0.000 1.253

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.61791.61791.48081.4808
F21.61792.61812.51512.5151
F31.61792.61812.51512.5151
H41.48082.51512.51512.4964
H51.48082.51512.51512.4964

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.013 F2 Si1 H4 108.432
F2 Si1 H5 108.432 F3 Si1 H4 108.432
F3 Si1 H5 108.432 H4 Si1 H5 114.903
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.663      
2 F -0.267      
3 F -0.267      
4 H -0.065      
5 H -0.065      


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 1.455 1.455
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.270 0.000 0.000
y 0.000 -26.281 0.000
z 0.000 0.000 -23.308
Traceless
 xyz
x 1.525 0.000 0.000
y 0.000 -2.992 0.000
z 0.000 0.000 1.467
Polar
3z2-r22.934
x2-y23.011
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.906 0.000 0.000
y 0.000 3.475 0.000
z 0.000 0.000 3.573


<r2> (average value of r2) Å2
<r2> 59.587
(<r2>)1/2 7.719