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

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 C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-489.228568
Energy at 298.15K 
HF Energy-489.228568
Nuclear repulsion energy100.215762
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 887 847 113.53 3.58 0.63 0.77
2 A1 332 317 17.90 0.76 0.37 0.55
3 B2 917 875 137.12 4.97 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1068.2 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1020.0 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
0.98612 0.29035 0.22431

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.579
F2 0.000 1.236 -0.451
F3 0.000 -1.236 -0.451

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.60901.6090
F21.60902.4723
F31.60902.4723

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 100.394
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 0.742      
2 F -0.371      
3 F -0.371      


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 1.005 1.005
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.237 0.000 0.000
y 0.000 -24.283 0.000
z 0.000 0.000 -22.911
Traceless
 xyz
x 4.360 0.000 0.000
y 0.000 -3.209 0.000
z 0.000 0.000 -1.151
Polar
3z2-r2-2.301
x2-y25.046
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.500 0.000 0.000
y 0.000 3.832 0.000
z 0.000 0.000 3.082


<r2> (average value of r2) Å2
<r2> 49.690
(<r2>)1/2 7.049

State 2 (3B1)

Jump to S1C1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-489.109137
Energy at 298.15K-488.989367
HF Energy-489.109137
Nuclear repulsion energy98.431142
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 826 789 46.21      
2 A1 263 251 16.89      
3 B2 965 921 120.29      

Unscaled Zero Point Vibrational Energy (zpe) 1026.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 980.4 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 B1B95/6-31G**
ABC
1.41828 0.23838 0.20408

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

Point Group is C2v

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 0.699      
2 F -0.349      
3 F -0.349      


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 1.595 1.595
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.438 0.000 0.000
y 0.000 -24.468 0.000
z 0.000 0.000 -19.983
Traceless
 xyz
x -0.213 0.000 0.000
y 0.000 -3.257 0.000
z 0.000 0.000 3.470
Polar
3z2-r26.941
x2-y22.030
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.865 0.000 0.000
y 0.000 3.189 0.000
z 0.000 0.000 2.543


<r2> (average value of r2) Å2
<r2> 53.235
(<r2>)1/2 7.296