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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B2PLYP/aug-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 B2PLYP/aug-cc-pVTZ
 hartrees
Energy at 0K-490.383278
Energy at 298.15K 
HF Energy-490.177492
Nuclear repulsion energy117.978954
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 B2PLYP/aug-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 2322 2232 54.29 212.29 0.06 0.11
2 A1 993 955 120.31 4.43 0.72 0.84
3 A1 854 821 75.48 6.96 0.08 0.15
4 A1 311 299 17.87 0.47 0.71 0.83
5 A2 739 710 0.00 6.07 0.75 0.86
6 B1 2334 2243 136.93 31.69 0.75 0.86
7 B1 715 687 127.35 2.21 0.75 0.86
8 B2 971 933 293.51 0.01 0.75 0.86
9 B2 901 866 6.18 3.95 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5070.6 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 4872.8 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 B2PLYP/aug-cc-pVTZ
ABC
0.80663 0.25395 0.20780

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/aug-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 1.291 -0.490
F3 0.000 -1.291 -0.490
H4 1.236 0.000 1.245
H5 -1.236 0.000 1.245

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59861.59861.46771.4677
F21.59862.58152.49072.4907
F31.59862.58152.49072.4907
H41.46772.49072.49072.4714
H51.46772.49072.49072.4714

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.686 F2 Si1 H4 108.564
F2 Si1 H5 108.564 F3 Si1 H4 108.564
F3 Si1 H5 108.564 H4 Si1 H5 114.689
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.336      
2 F -0.577      
3 F -0.577      
4 H -0.091      
5 H -0.091      


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 1.637 1.637
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.114 0.000 0.000
y 0.000 -26.703 0.000
z 0.000 0.000 -23.355
Traceless
 xyz
x 1.915 0.000 0.000
y 0.000 -3.469 0.000
z 0.000 0.000 1.554
Polar
3z2-r23.108
x2-y23.589
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.991 0.000 0.000
y 0.000 3.777 0.000
z 0.000 0.000 3.791


<r2> (average value of r2) Å2
<r2> 58.578
(<r2>)1/2 7.654