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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-52.274206
Energy at 298.15K 
HF Energy-52.274206
Nuclear repulsion energy27.121797
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 714 696 114.82 7.14 0.44 0.61
2 A1 280 273 18.30 1.57 0.55 0.71
3 B2 718 700 130.13 7.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 856.1 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 834.3 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
0.80365 0.26296 0.19813

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 0.642
F2 0.000 1.299 -0.499
F3 0.000 -1.299 -0.499

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.72891.7289
F21.72892.5978
F31.72892.5978

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 97.408
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 0.962      
2 F -0.481      
3 F -0.481      


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 2.866 2.866
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.370 0.000 0.000
y 0.000 -27.067 0.000
z 0.000 0.000 -22.581
Traceless
 xyz
x 6.454 0.000 0.000
y 0.000 -6.592 0.000
z 0.000 0.000 0.138
Polar
3z2-r20.276
x2-y28.697
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.249 0.000 0.000
y 0.000 4.292 0.000
z 0.000 0.000 3.548


<r2> (average value of r2) Å2
<r2> 42.918
(<r2>)1/2 6.551

State 2 (3B1)

Jump to S1C1
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-52.158362
Energy at 298.15K-52.038374
HF Energy-52.158362
Nuclear repulsion energy25.822538
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 641 625 34.92      
2 A1 197 192 23.36      
3 B2 760 740 81.04      

Unscaled Zero Point Vibrational Energy (zpe) 798.6 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 778.3 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
1.27345 0.20231 0.17457

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 0.875      
2 F -0.437      
3 F -0.437      


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 2.660 2.660
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.673 0.000 0.000
y 0.000 -27.771 0.000
z 0.000 0.000 -19.330
Traceless
 xyz
x 1.877 0.000 0.000
y 0.000 -7.270 0.000
z 0.000 0.000 5.392
Polar
3z2-r210.785
x2-y26.098
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.699 0.000 0.000
y 0.000 4.077 0.000
z 0.000 0.000 2.981


<r2> (average value of r2) Å2
<r2> 48.262
(<r2>)1/2 6.947