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All results from a given calculation for SiF4 (Silicon tetrafluoride)

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-684.826015
Energy at 298.15K-684.827636
Nuclear repulsion energy261.235505
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 PBEPBE/3-21G
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 738 731 0.00      
2 E 243 241 0.00      
2 E 243 241 0.00      
3 T2 1033 1023 112.21      
3 T2 1033 1023 112.21      
3 T2 1033 1023 112.21      
4 T2 343 340 46.24      
4 T2 343 340 46.24      
4 T2 343 340 46.24      

Unscaled Zero Point Vibrational Energy (zpe) 2674.8 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 2650.5 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 PBEPBE/3-21G
ABC
0.12620 0.12620 0.12620

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.000
F2 0.938 0.938 0.938
F3 -0.938 -0.938 0.938
F4 -0.938 0.938 -0.938
F5 0.938 -0.938 -0.938

Atom - Atom Distances (Å)
  Si1 F2 F3 F4 F5
Si11.62381.62381.62381.6238
F21.62382.65172.65172.6517
F31.62382.65172.65172.6517
F41.62382.65172.65172.6517
F51.62382.65172.65172.6517

picture of Silicon tetrafluoride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 109.471 F2 Si1 F4 109.471
F2 Si1 F5 109.471 F3 Si1 F4 109.471
F3 Si1 F5 109.471 F4 Si1 F5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.369      
2 F -0.342      
3 F -0.342      
4 F -0.342      
5 F -0.342      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.923 0.000 0.000
y 0.000 -32.923 0.000
z 0.000 0.000 -32.923
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.336 0.000 0.000
y 0.000 2.336 0.000
z 0.000 0.000 2.336


<r2> (average value of r2) Å2
<r2> 115.486
(<r2>)1/2 10.746