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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: PBE1PBE/aug-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 PBE1PBE/aug-cc-pVDZ
 hartrees
Energy at 0K-490.197079
Energy at 298.15K 
HF Energy-490.197079
Nuclear repulsion energy115.801974
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 PBE1PBE/aug-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 2276 2189 43.86 223.57 0.07 0.13
2 A1 949 913 106.25 5.40 0.71 0.83
3 A1 827 795 73.55 7.74 0.10 0.18
4 A1 289 278 16.84 0.58 0.72 0.84
5 A2 705 678 0.00 7.12 0.75 0.86
6 B1 2297 2209 107.43 34.61 0.75 0.86
7 B1 687 661 110.89 2.71 0.75 0.86
8 B2 932 896 269.80 0.04 0.75 0.86
9 B2 864 831 2.88 4.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4913.4 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 4724.7 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 PBE1PBE/aug-cc-pVDZ
ABC
0.77010 0.24578 0.20046

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.467
F2 0.000 1.312 -0.503
F3 0.000 -1.312 -0.503
H4 1.258 0.000 1.254
H5 -1.258 0.000 1.254

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.63151.63151.48401.4840
F21.63152.62382.52782.5278
F31.63152.62382.52782.5278
H41.48402.52782.52782.5166
H51.48402.52782.52782.5166

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.046 F2 Si1 H4 108.369
F2 Si1 H5 108.369 F3 Si1 H4 108.369
F3 Si1 H5 108.369 H4 Si1 H5 115.977
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.816      
2 F -0.577      
3 F -0.577      
4 H 0.169      
5 H 0.169      


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 1.916 1.916
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.925 0.000 0.000
y 0.000 -26.907 0.000
z 0.000 0.000 -23.157
Traceless
 xyz
x 2.107 0.000 0.000
y 0.000 -3.866 0.000
z 0.000 0.000 1.759
Polar
3z2-r23.519
x2-y23.982
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.095 0.000 0.000
y 0.000 3.886 0.000
z 0.000 0.000 3.891


<r2> (average value of r2) Å2
<r2> 60.092
(<r2>)1/2 7.752