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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-689.048716
Energy at 298.15K-689.050495
Nuclear repulsion energy269.504481
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 B1B95/6-31G**
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 799 763 0.00      
2 E 253 242 0.00      
2 E 253 242 0.00      
3 T2 1061 1013 206.66      
3 T2 1061 1013 206.66      
3 T2 1061 1013 206.66      
4 T2 375 358 45.89      
4 T2 375 358 45.89      
4 T2 375 358 45.89      

Unscaled Zero Point Vibrational Energy (zpe) 2807.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 2680.5 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 B1B95/6-31G**
ABC
0.13431 0.13431 0.13431

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.000
F2 0.909 0.909 0.909
F3 -0.909 -0.909 0.909
F4 -0.909 0.909 -0.909
F5 0.909 -0.909 -0.909

Atom - Atom Distances (Å)
  Si1 F2 F3 F4 F5
Si11.57401.57401.57401.5740
F21.57402.57032.57032.5703
F31.57402.57032.57032.5703
F41.57402.57032.57032.5703
F51.57402.57032.57032.5703

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 B1B95/6-31G** 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 -31.633 0.000 0.000
y 0.000 -31.633 0.000
z 0.000 0.000 -31.633
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 2.486 0.000 0.000
y 0.000 2.486 0.000
z 0.000 0.000 2.486


<r2> (average value of r2) Å2
<r2> 108.945
(<r2>)1/2 10.438