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All results from a given calculation for SiF2 (Silicon difluoride)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-488.902728
Energy at 298.15K 
HF Energy-488.902728
Nuclear repulsion energy98.831384
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/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 835 823 88.72 4.44 0.56 0.72
2 A1 311 306 13.60 0.86 0.41 0.58
3 B2 872 860 111.76 6.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1008.4 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 994.6 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/6-31G**
ABC
0.98218 0.27901 0.21728

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.581
F2 0.000 1.261 -0.452
F3 0.000 -1.261 -0.452

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.62951.6295
F21.62952.5220
F31.62952.5220

picture of Silicon difluoride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 101.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.640      
2 F -0.320      
3 F -0.320      


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 0.806 0.806
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.644 0.000 0.000
y 0.000 -24.199 0.000
z 0.000 0.000 -22.958
Traceless
 xyz
x 3.934 0.000 0.000
y 0.000 -2.898 0.000
z 0.000 0.000 -1.036
Polar
3z2-r2-2.072
x2-y24.555
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.564 0.000 0.000
y 0.000 4.068 0.000
z 0.000 0.000 3.317


<r2> (average value of r2) Å2
<r2> 50.918
(<r2>)1/2 7.136

State 2 (3B1)

Jump to S1C1
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-488.788072
Energy at 298.15K-488.668260
HF Energy-488.788072
Nuclear repulsion energy97.065614
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/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 778 767 33.07      
2 A1 251 247 12.38      
3 B2 921 908 95.77      

Unscaled Zero Point Vibrational Energy (zpe) 974.4 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 961.1 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/6-31G**
ABC
1.43296 0.22912 0.19753

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

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.599      
2 F -0.300      
3 F -0.300      


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 1.295 1.295
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.799 0.000 0.000
y 0.000 -24.201 0.000
z 0.000 0.000 -20.247
Traceless
 xyz
x -0.575 0.000 0.000
y 0.000 -2.678 0.000
z 0.000 0.000 3.253
Polar
3z2-r26.505
x2-y21.402
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.983 0.000 0.000
y 0.000 3.494 0.000
z 0.000 0.000 2.759


<r2> (average value of r2) Å2
<r2> 54.605
(<r2>)1/2 7.390