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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B97D3/6-31G(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 B97D3/6-31G(2df,p)
 hartrees
Energy at 0K-490.389459
Energy at 298.15K 
HF Energy-490.389459
Nuclear repulsion energy117.832350
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 B97D3/6-31G(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 2219 2219 61.45 140.17 0.10 0.19
2 A1 969 969 120.75 10.48 0.63 0.78
3 A1 836 836 45.82 5.82 0.12 0.22
4 A1 313 313 13.57 0.55 0.73 0.85
5 A2 718 718 0.00 9.11 0.75 0.86
6 B1 2226 2226 160.17 33.39 0.75 0.86
7 B1 698 698 111.10 4.08 0.75 0.86
8 B2 977 977 249.44 0.24 0.75 0.86
9 B2 876 876 0.02 5.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4915.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4915.4 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 B97D3/6-31G(2df,p)
ABC
0.81408 0.25179 0.20703

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.447
F2 0.000 1.296 -0.487
F3 0.000 -1.296 -0.487
H4 1.243 0.000 1.254
H5 -1.243 0.000 1.254

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59751.59751.48241.4824
F21.59752.59232.50152.5015
F31.59752.59232.50152.5015
H41.48242.50152.50152.4864
H51.48242.50152.50152.4864

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.454 F2 Si1 H4 108.566
F2 Si1 H5 108.566 F3 Si1 H4 108.566
F3 Si1 H5 108.566 H4 Si1 H5 113.997
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.379      
2 F -0.188      
3 F -0.188      
4 H -0.001      
5 H -0.001      


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 1.196 1.196
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.625 0.000 0.000
y 0.000 -25.149 0.000
z 0.000 0.000 -22.650
Traceless
 xyz
x 1.275 0.000 0.000
y 0.000 -2.511 0.000
z 0.000 0.000 1.237
Polar
3z2-r22.474
x2-y22.524
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.540 0.000 0.000
y 0.000 3.222 0.000
z 0.000 0.000 3.295


<r2> (average value of r2) Å2
<r2> 58.204
(<r2>)1/2 7.629