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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3PW91/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/daug-cc-pVDZ
 hartrees
Energy at 0K-490.406616
Energy at 298.15K 
HF Energy-490.406616
Nuclear repulsion energy115.655770
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 B3PW91/daug-cc-pVDZ
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 2268 2268 46.18 223.57 0.07 0.12
2 A1 949 949 103.79 5.35 0.72 0.84
3 A1 819 819 73.19 8.10 0.08 0.15
4 A1 287 287 16.75 0.57 0.72 0.84
5 A2 703 703 0.00 7.23 0.75 0.86
6 B1 2289 2289 114.15 35.57 0.75 0.86
7 B1 684 684 108.86 2.69 0.75 0.86
8 B2 927 927 264.60 0.00 0.75 0.86
9 B2 860 860 5.97 4.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4892.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4892.6 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 B3PW91/daug-cc-pVDZ
ABC
0.77264 0.24439 0.19965

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/daug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.466
F2 0.000 1.316 -0.502
F3 0.000 -1.316 -0.502
H4 1.256 0.000 1.254
H5 -1.256 0.000 1.254

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.63361.63361.48291.4829
F21.63362.63182.52842.5284
F31.63362.63182.52842.5284
H41.48292.52842.52842.5125
H51.48292.52842.52842.5125

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.326 F2 Si1 H4 108.351
F2 Si1 H5 108.351 F3 Si1 H4 108.351
F3 Si1 H5 108.351 H4 Si1 H5 115.807
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.653      
2 F -0.560      
3 F -0.560      
4 H 0.234      
5 H 0.234      


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 1.897 1.897
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.867 0.000 0.000
y 0.000 -26.936 0.000
z 0.000 0.000 -23.121
Traceless
 xyz
x 2.162 0.000 0.000
y 0.000 -3.942 0.000
z 0.000 0.000 1.780
Polar
3z2-r23.561
x2-y24.069
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.175 0.000 0.000
y 0.000 3.959 0.000
z 0.000 0.000 3.959


<r2> (average value of r2) Å2
<r2> 60.228
(<r2>)1/2 7.761