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

using model chemistry: mPW1PW91/6-31G**

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 mPW1PW91/6-31G**
 hartrees
Energy at 0K-489.196967
Energy at 298.15K 
HF Energy-489.196967
Nuclear repulsion energy100.072755
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 mPW1PW91/6-31G**
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 879 837 112.40 3.63 0.62 0.77
2 A1 332 316 17.70 0.77 0.36 0.53
3 B2 910 866 136.49 5.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1060.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 1009.3 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 mPW1PW91/6-31G**
ABC
0.98956 0.28859 0.22343

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.578
F2 0.000 1.240 -0.450
F3 0.000 -1.240 -0.450

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.61081.6108
F21.61082.4798
F31.61082.4798

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 100.663
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.748      
2 F -0.374      
3 F -0.374      


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 0.967 0.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.260 0.000 0.000
y 0.000 -24.353 0.000
z 0.000 0.000 -23.013
Traceless
 xyz
x 4.423 0.000 0.000
y 0.000 -3.216 0.000
z 0.000 0.000 -1.206
Polar
3z2-r2-2.412
x2-y25.093
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.527 0.000 0.000
y 0.000 3.859 0.000
z 0.000 0.000 3.097


<r2> (average value of r2) Å2
<r2> 49.869
(<r2>)1/2 7.062

State 2 (3B1)

Jump to S1C1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-489.084881
Energy at 298.15K-488.965114
HF Energy-489.084881
Nuclear repulsion energy98.316609
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 mPW1PW91/6-31G**
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 826 786 48.01      
2 A1 265 252 17.08      
3 B2 968 921 122.68      

Unscaled Zero Point Vibrational Energy (zpe) 1029.4 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 979.5 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 mPW1PW91/6-31G**
ABC
1.44050 0.23652 0.20316

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.708      
2 F -0.354      
3 F -0.354      


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 1.593 1.593
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.441 0.000 0.000
y 0.000 -24.559 0.000
z 0.000 0.000 -19.989
Traceless
 xyz
x -0.166 0.000 0.000
y 0.000 -3.345 0.000
z 0.000 0.000 3.511
Polar
3z2-r27.022
x2-y22.119
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.836 0.000 0.000
y 0.000 3.194 0.000
z 0.000 0.000 2.504


<r2> (average value of r2) Å2
<r2> 53.431
(<r2>)1/2 7.310