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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: M06-2X/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at M06-2X/6-31G(2df,p)
 hartrees
Energy at 0K-490.401090
Energy at 298.15K 
HF Energy-490.401090
Nuclear repulsion energy119.087807
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 M06-2X/6-31G(2df,p)
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 2332 2221 56.21 119.30 0.10 0.17
2 A1 1003 955 139.63 9.25 0.63 0.77
3 A1 895 853 46.91 4.44 0.16 0.28
4 A1 325 310 16.95 0.41 0.74 0.85
5 A2 742 707 0.00 8.58 0.75 0.86
6 B1 2337 2226 140.96 25.38 0.75 0.86
7 B1 722 688 134.06 3.71 0.75 0.86
8 B2 1021 973 269.97 0.04 0.75 0.86
9 B2 920 876 7.62 4.85 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5148.6 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 4903.5 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 M06-2X/6-31G(2df,p)
ABC
0.82134 0.25888 0.21200

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.446
F2 0.000 1.278 -0.485
F3 0.000 -1.278 -0.485
H4 1.233 0.000 1.245
H5 -1.233 0.000 1.245

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58131.58131.46881.4688
F21.58132.55592.47912.4791
F31.58132.55592.47912.4791
H41.46882.47912.47912.4651
H51.46882.47912.47912.4651

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.835 F2 Si1 H4 108.682
F2 Si1 H5 108.682 F3 Si1 H4 108.682
F3 Si1 H5 108.682 H4 Si1 H5 114.103
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.484      
2 F -0.232      
3 F -0.232      
4 H -0.010      
5 H -0.010      


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 1.336 1.336
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.537 0.000 0.000
y 0.000 -25.279 0.000
z 0.000 0.000 -22.615
Traceless
 xyz
x 1.410 0.000 0.000
y 0.000 -2.703 0.000
z 0.000 0.000 1.293
Polar
3z2-r22.586
x2-y22.743
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.360 0.000 0.000
y 0.000 2.983 0.000
z 0.000 0.000 3.073


<r2> (average value of r2) Å2
<r2> 57.223
(<r2>)1/2 7.565