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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: TPSSh/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/cc-pVQZ
 hartrees
Energy at 0K-490.630867
Energy at 298.15K 
HF Energy-490.630867
Nuclear repulsion energy118.241883
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 TPSSh/cc-pVQZ
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 2302 2302 54.20 195.04 0.07 0.13
2 A1 989 989 119.17 5.52 0.71 0.83
3 A1 855 855 65.46 5.80 0.11 0.21
4 A1 311 311 16.46 0.53 0.72 0.84
5 A2 733 733 0.00 7.25 0.75 0.86
6 B1 2312 2312 139.90 32.17 0.75 0.86
7 B1 707 707 121.60 3.02 0.75 0.86
8 B2 975 975 280.42 0.01 0.75 0.86
9 B2 894 894 0.84 4.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5038.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5038.6 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 TPSSh/cc-pVQZ
ABC
0.81258 0.25470 0.20874

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.450
F2 0.000 1.289 -0.488
F3 0.000 -1.289 -0.488
H4 1.237 0.000 1.244
H5 -1.237 0.000 1.244

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59391.59391.47011.4701
F21.59392.57742.48822.4882
F31.59392.57742.48822.4882
H41.47012.48822.48822.4749
H51.47012.48822.48822.4749

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.896 F2 Si1 H4 108.526
F2 Si1 H5 108.526 F3 Si1 H4 108.526
F3 Si1 H5 108.526 H4 Si1 H5 114.647
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.975      
2 F -0.341      
3 F -0.341      
4 H -0.146      
5 H -0.146      


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 1.470 1.470
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.876 0.000 0.000
y 0.000 3.598 0.000
z 0.000 0.000 3.634


<r2> (average value of r2) Å2
<r2> 58.169
(<r2>)1/2 7.627