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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B1B95/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 B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-490.575269
Energy at 298.15K 
HF Energy-490.575269
Nuclear repulsion energy118.309469
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 B1B95/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 2302 2206 52.63 217.39 0.06 0.12
2 A1 974 933 118.90 4.64 0.70 0.82
3 A1 863 827 70.28 6.43 0.10 0.19
4 A1 309 297 17.68 0.45 0.72 0.84
5 A2 726 696 0.00 6.61 0.75 0.86
6 B1 2315 2219 135.25 32.59 0.75 0.86
7 B1 706 677 123.48 2.44 0.75 0.86
8 B2 968 928 287.60 0.10 0.75 0.86
9 B2 894 857 0.55 3.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5028.0 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 4819.4 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 B1B95/aug-cc-pVTZ
ABC
0.80845 0.25582 0.20928

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/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 1.286 -0.490
F3 0.000 -1.286 -0.490
H4 1.240 0.000 1.242
H5 -1.240 0.000 1.242

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59341.59341.47031.4703
F21.59342.57122.48772.4877
F31.59342.57122.48772.4877
H41.47032.48772.48772.4795
H51.47032.48772.48772.4795

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.570 F2 Si1 H4 108.518
F2 Si1 H5 108.518 F3 Si1 H4 108.518
F3 Si1 H5 108.518 H4 Si1 H5 114.963
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.152      
2 F -0.541      
3 F -0.541      
4 H -0.035      
5 H -0.035      


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 1.613 1.613
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.845 0.000 0.000
y 0.000 -26.364 0.000
z 0.000 0.000 -23.110
Traceless
 xyz
x 1.892 0.000 0.000
y 0.000 -3.387 0.000
z 0.000 0.000 1.495
Polar
3z2-r22.990
x2-y23.519
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.041 0.000 0.000
y 0.000 3.767 0.000
z 0.000 0.000 3.797


<r2> (average value of r2) Å2
<r2> 58.138
(<r2>)1/2 7.625