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

using model chemistry: B3LYP/CEP-121G*

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 B3LYP/CEP-121G*
 hartrees
Energy at 0K-52.351922
Energy at 298.15K 
HF Energy-52.351922
Nuclear repulsion energy28.450038
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 B3LYP/CEP-121G*
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 808 783 133.54 3.61 0.66 0.79
2 A1 321 311 16.63 0.92 0.31 0.48
3 B2 821 796 167.13 5.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 974.6 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 944.8 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 B3LYP/CEP-121G*
ABC
0.94986 0.28184 0.21735

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.590
F2 0.000 1.255 -0.459
F3 0.000 -1.255 -0.459

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.63571.6357
F21.63572.5093
F31.63572.5093

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 100.177
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.649      
2 F -0.324      
3 F -0.324      


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 1.428 1.428
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.561 0.000 0.000
y 0.000 -24.100 0.000
z 0.000 0.000 -22.105
Traceless
 xyz
x 4.542 0.000 0.000
y 0.000 -3.767 0.000
z 0.000 0.000 -0.775
Polar
3z2-r2-1.550
x2-y25.539
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.730 0.000 0.000
y 0.000 4.107 0.000
z 0.000 0.000 3.516


<r2> (average value of r2) Å2
<r2> 39.868
(<r2>)1/2 6.314

State 2 (3B1)

Jump to S1C1
Energy calculated at B3LYP/CEP-121G*
 hartrees
Energy at 0K-52.235780
Energy at 298.15K-52.115951
HF Energy-52.235780
Nuclear repulsion energy27.511924
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 B3LYP/CEP-121G*
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 768 744 59.93      
2 A1 247 239 15.62      
3 B2 887 860 145.76      

Unscaled Zero Point Vibrational Energy (zpe) 950.5 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 921.4 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 B3LYP/CEP-121G*
ABC
1.36181 0.23277 0.19879

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.610      
2 F -0.305      
3 F -0.305      


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 1.739 1.739
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.874 0.000 0.000
y 0.000 -24.247 0.000
z 0.000 0.000 -19.307
Traceless
 xyz
x -0.097 0.000 0.000
y 0.000 -3.657 0.000
z 0.000 0.000 3.753
Polar
3z2-r27.507
x2-y22.373
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.429 0.000 0.000
y 0.000 3.578 0.000
z 0.000 0.000 2.922


<r2> (average value of r2) Å2
<r2> 43.337
(<r2>)1/2 6.583