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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B97D3/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B97D3/6-311G*
 hartrees
Energy at 0K-490.452646
Energy at 298.15K 
HF Energy-490.452646
Nuclear repulsion energy116.694651
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 B97D3/6-311G*
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 2237 2237 62.25 178.58 0.11 0.21
2 A1 968 968 152.03 19.38 0.68 0.81
3 A1 816 816 64.62 5.26 0.20 0.34
4 A1 308 308 17.73 1.16 0.74 0.85
5 A2 724 724 0.00 22.10 0.75 0.86
6 B1 2250 2250 175.27 48.40 0.75 0.86
7 B1 703 703 137.28 7.75 0.75 0.86
8 B2 986 986 317.48 5.20 0.75 0.86
9 B2 861 861 10.20 9.43 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4926.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4926.5 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 B97D3/6-311G*
ABC
0.79315 0.24780 0.20300

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.456
F2 0.000 1.307 -0.495
F3 0.000 -1.307 -0.495
H4 1.244 0.000 1.258
H5 -1.244 0.000 1.258

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.61631.61631.48041.4804
F21.61632.61402.51582.5158
F31.61632.61402.51582.5158
H41.48042.51582.51582.4888
H51.48042.51582.51582.4888

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.924 F2 Si1 H4 108.584
F2 Si1 H5 108.584 F3 Si1 H4 108.584
F3 Si1 H5 108.584 H4 Si1 H5 114.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.025      
2 F -0.400      
3 F -0.400      
4 H -0.112      
5 H -0.112      


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 1.687 1.687
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.955 0.000 0.000
y 0.000 -26.567 0.000
z 0.000 0.000 -23.079
Traceless
 xyz
x 1.868 0.000 0.000
y 0.000 -3.550 0.000
z 0.000 0.000 1.682
Polar
3z2-r23.364
x2-y23.612
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.378 0.000 0.000
y 0.000 2.782 0.000
z 0.000 0.000 3.007


<r2> (average value of r2) Å2
<r2> 59.446
(<r2>)1/2 7.710