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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-490.514973
Energy at 298.15K 
HF Energy-490.514973
Nuclear repulsion energy118.631052
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(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 2273 2193 57.36 133.71 0.10 0.18
2 A1 992 957 132.42 9.95 0.62 0.77
3 A1 872 842 45.37 5.13 0.14 0.25
4 A1 320 308 15.37 0.48 0.73 0.85
5 A2 733 707 0.00 8.57 0.75 0.86
6 B1 2278 2199 150.41 30.68 0.75 0.86
7 B1 714 689 122.32 3.80 0.75 0.86
8 B2 1007 972 260.77 0.09 0.75 0.86
9 B2 904 873 2.88 5.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5046.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 4869.4 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(2df,p)
ABC
0.82079 0.25593 0.21011

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.445
F2 0.000 1.285 -0.485
F3 0.000 -1.285 -0.485
H4 1.237 0.000 1.248
H5 -1.237 0.000 1.248

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58681.58681.47461.4746
F21.58682.57082.48702.4870
F31.58682.57082.48702.4870
H41.47462.48702.48702.4748
H51.47462.48702.48702.4748

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.200 F2 Si1 H4 108.599
F2 Si1 H5 108.599 F3 Si1 H4 108.599
F3 Si1 H5 108.599 H4 Si1 H5 114.099
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.382      
2 F -0.186      
3 F -0.186      
4 H -0.005      
5 H -0.005      


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 1.274 1.274
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.660 0.000 0.000
y 0.000 -25.319 0.000
z 0.000 0.000 -22.700
Traceless
 xyz
x 1.349 0.000 0.000
y 0.000 -2.639 0.000
z 0.000 0.000 1.290
Polar
3z2-r22.580
x2-y22.658
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.417 0.000 0.000
y 0.000 3.092 0.000
z 0.000 0.000 3.168


<r2> (average value of r2) Å2
<r2> 57.644
(<r2>)1/2 7.592