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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3PW91/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-490.490229
Energy at 298.15K 
HF Energy-490.490229
Nuclear repulsion energy117.928819
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/aug-cc-pVTZ
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 2280 2200 51.71 216.16 0.06 0.12
2 A1 971 937 112.31 4.59 0.71 0.83
3 A1 852 822 71.95 6.73 0.10 0.17
4 A1 309 299 17.15 0.47 0.72 0.83
5 A2 726 700 0.00 6.57 0.75 0.86
6 B1 2293 2213 132.11 32.74 0.75 0.86
7 B1 704 680 120.33 2.42 0.75 0.86
8 B2 960 926 281.89 0.04 0.75 0.86
9 B2 889 858 0.28 3.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4992.2 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 4818.0 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/aug-cc-pVTZ
ABC
0.80627 0.25368 0.20777

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.452
F2 0.000 1.291 -0.490
F3 0.000 -1.291 -0.490
H4 1.243 0.000 1.247
H5 -1.243 0.000 1.247

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59811.59811.47561.4756
F21.59812.58222.49602.4960
F31.59812.58222.49602.4960
H41.47562.49602.49602.4854
H51.47562.49602.49602.4854

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.779 F2 Si1 H4 108.528
F2 Si1 H5 108.528 F3 Si1 H4 108.528
F3 Si1 H5 108.528 H4 Si1 H5 114.741
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.278      
2 F -0.572      
3 F -0.572      
4 H -0.067      
5 H -0.067      


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 1.595 1.595
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.862 0.000 0.000
y 0.000 -26.416 0.000
z 0.000 0.000 -23.144
Traceless
 xyz
x 1.918 0.000 0.000
y 0.000 -3.413 0.000
z 0.000 0.000 1.495
Polar
3z2-r22.990
x2-y23.554
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.082 0.000 0.000
y 0.000 3.822 0.000
z 0.000 0.000 3.845


<r2> (average value of r2) Å2
<r2> 58.464
(<r2>)1/2 7.646