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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3LYPultrafine/6-31G*

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/6-31G*
 hartrees
Energy at 0K-490.489710
Energy at 298.15K 
HF Energy-490.489710
Nuclear repulsion energy117.665097
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/6-31G*
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 2309 2212 74.76 140.21 0.11 0.20
2 A1 996 955 169.54 19.02 0.61 0.76
3 A1 873 837 41.81 5.48 0.22 0.37
4 A1 317 304 17.03 0.73 0.74 0.85
5 A2 747 715 0.00 14.19 0.75 0.86
6 B1 2319 2221 207.38 39.69 0.75 0.86
7 B1 725 695 138.36 5.20 0.75 0.86
8 B2 1036 993 315.71 2.26 0.75 0.86
9 B2 916 878 0.20 9.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5119.6 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 4904.5 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 B3LYPultrafine/6-31G*
ABC
0.80801 0.25174 0.20641

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.449
F2 0.000 1.297 -0.490
F3 0.000 -1.297 -0.490
H4 1.236 0.000 1.261
H5 -1.236 0.000 1.261

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.60101.60101.47841.4784
F21.60102.59342.50462.5046
F31.60102.59342.50462.5046
H41.47842.50462.50462.4715
H51.47842.50462.50462.4715

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.177 F2 Si1 H4 108.781
F2 Si1 H5 108.781 F3 Si1 H4 108.781
F3 Si1 H5 108.781 H4 Si1 H5 113.415
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.949      
2 F -0.374      
3 F -0.374      
4 H -0.101      
5 H -0.101      


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 1.452 1.452
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.673 0.000 0.000
y 0.000 -25.686 0.000
z 0.000 0.000 -22.677
Traceless
 xyz
x 1.508 0.000 0.000
y 0.000 -3.011 0.000
z 0.000 0.000 1.502
Polar
3z2-r23.005
x2-y23.013
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.056 0.000 0.000
y 0.000 2.657 0.000
z 0.000 0.000 2.817


<r2> (average value of r2) Å2
<r2> 58.431
(<r2>)1/2 7.644