return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: M06-2X/TZVP

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 M06-2X/TZVP
 hartrees
Energy at 0K-489.264490
Energy at 298.15K 
HF Energy-489.264490
Nuclear repulsion energy99.633496
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 M06-2X/TZVP
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 856 810 160.49 3.58 0.67 0.80
2 A1 342 324 21.56 0.83 0.40 0.57
3 B2 852 806 198.80 5.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1025.0 cm-1
Scaled (by 0.9462) Zero Point Vibrational Energy (zpe) 969.9 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 M06-2X/TZVP
ABC
0.94176 0.29220 0.22301

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.593
F2 0.000 1.232 -0.461
F3 0.000 -1.232 -0.461

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.62151.6215
F21.62152.4644
F31.62152.4644

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 98.914
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.668      
2 F -0.334      
3 F -0.334      


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 1.640 1.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.594 0.000 0.000
y 0.000 -25.536 0.000
z 0.000 0.000 -23.403
Traceless
 xyz
x 4.876 0.000 0.000
y 0.000 -4.038 0.000
z 0.000 0.000 -0.838
Polar
3z2-r2-1.676
x2-y25.942
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.562 0.000 0.000
y 0.000 3.895 0.000
z 0.000 0.000 3.304


<r2> (average value of r2) Å2
<r2> 50.346
(<r2>)1/2 7.096

State 2 (3B1)

Jump to S1C1
Energy calculated at M06-2X/TZVP
 hartrees
Energy at 0K-489.149627
Energy at 298.15K-489.029830
HF Energy-489.149627
Nuclear repulsion energy98.100567
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 M06-2X/TZVP
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 816 772 79.33      
2 A1 246 233 19.87      
3 B2 931 881 169.70      

Unscaled Zero Point Vibrational Energy (zpe) 996.8 cm-1
Scaled (by 0.9462) Zero Point Vibrational Energy (zpe) 943.1 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 M06-2X/TZVP
ABC
1.35997 0.23947 0.20362

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/TZVP

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/TZVP 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 1.881 1.881
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.922 0.000 0.000
y 0.000 -25.876 0.000
z 0.000 0.000 -20.617
Traceless
 xyz
x 0.324 0.000 0.000
y 0.000 -4.106 0.000
z 0.000 0.000 3.782
Polar
3z2-r27.564
x2-y22.953
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.970 0.000 0.000
y 0.000 3.405 0.000
z 0.000 0.000 2.656


<r2> (average value of r2) Å2
<r2> 53.858
(<r2>)1/2 7.339