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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: HF/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-311G**
 hartrees
Energy at 0K-489.156340
Energy at 298.15K 
HF Energy-489.156340
Nuclear repulsion energy119.202232
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 HF/6-311G**
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 2434 2211 65.09 159.14 0.11 0.19
2 A1 1069 971 190.41 15.39 0.69 0.82
3 A1 916 832 101.56 2.35 0.24 0.39
4 A1 344 312 27.52 0.62 0.74 0.85
5 A2 805 732 0.00 16.69 0.75 0.86
6 B1 2433 2210 175.79 38.48 0.75 0.86
7 B1 775 704 208.19 4.46 0.75 0.86
8 B2 1067 969 417.24 4.77 0.75 0.86
9 B2 966 878 17.47 5.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5404.0 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 4909.6 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 HF/6-311G**
ABC
0.81312 0.26105 0.21275

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.451
F2 0.000 1.273 -0.489
F3 0.000 -1.273 -0.489
H4 1.227 0.000 1.242
H5 -1.227 0.000 1.242

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58201.58201.45991.4599
F21.58202.54532.47392.4739
F31.58202.54532.47392.4739
H41.45992.47392.47392.4541
H51.45992.47392.47392.4541

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.120 F2 Si1 H4 108.771
F2 Si1 H5 108.771 F3 Si1 H4 108.771
F3 Si1 H5 108.771 H4 Si1 H5 114.393
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.467      
2 F -0.511      
3 F -0.511      
4 H -0.222      
5 H -0.222      


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 1.990 1.990
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.786 0.000 0.000
y 0.000 -27.038 0.000
z 0.000 0.000 -23.141
Traceless
 xyz
x 2.303 0.000 0.000
y 0.000 -4.074 0.000
z 0.000 0.000 1.771
Polar
3z2-r23.542
x2-y24.251
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.934 0.000 0.000
y 0.000 2.319 0.000
z 0.000 0.000 2.557


<r2> (average value of r2) Å2
<r2> 57.586
(<r2>)1/2 7.589