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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: TPSSh/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-490.599711
Energy at 298.15K 
HF Energy-490.599711
Nuclear repulsion energy118.077487
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/6-311+G(3df,2p)
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 2306 2306 52.89 190.85 0.07 0.13
2 A1 986 986 115.01 5.65 0.73 0.85
3 A1 843 843 69.50 6.72 0.10 0.18
4 A1 310 310 16.09 0.59 0.73 0.84
5 A2 728 728 0.00 7.03 0.75 0.86
6 B1 2317 2317 132.71 33.11 0.75 0.86
7 B1 702 702 115.84 2.89 0.75 0.86
8 B2 964 964 281.35 0.01 0.75 0.86
9 B2 886 886 3.69 4.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5020.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5020.4 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 TPSSh/6-311+G(3df,2p)
ABC
0.81355 0.25344 0.20796

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.450
F2 0.000 1.292 -0.488
F3 0.000 -1.292 -0.488
H4 1.238 0.000 1.241
H5 -1.238 0.000 1.241

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59641.59641.46911.4691
F21.59642.58402.48822.4882
F31.59642.58402.48822.4882
H41.46912.48822.48822.4752
H51.46912.48822.48822.4752

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 108.062 F2 Si1 H4 108.448
F2 Si1 H5 108.448 F3 Si1 H4 108.448
F3 Si1 H5 108.448 H4 Si1 H5 114.800
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.003      
2 F -0.406      
3 F -0.406      
4 H -0.096      
5 H -0.096      


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 1.496 1.496
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 3.919 0.000 0.000
y 0.000 3.708 0.000
z 0.000 0.000 3.713


<r2> (average value of r2) Å2
<r2> 58.347
(<r2>)1/2 7.639