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: B3LYP/aug-cc-pVQZ

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/aug-cc-pVQZ
 hartrees
Energy at 0K-489.411890
Energy at 298.15K 
HF Energy-489.411890
Nuclear repulsion energy100.096951
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/aug-cc-pVQZ
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 831 805 132.34 4.14 0.63 0.77
2 A1 333 323 17.08 0.84 0.12 0.21
3 B2 843 816 176.79 5.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1003.4 cm-1
Scaled (by 0.9689) Zero Point Vibrational Energy (zpe) 972.2 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/aug-cc-pVQZ
ABC
0.99016 0.28871 0.22353

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVQZ

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
Si11.61041.6104
F21.61042.4793
F31.61042.4793

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 100.668
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.188      
2 F -0.594      
3 F -0.594      


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 1.256 1.256
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.020 0.000 0.000
y 0.000 -25.182 0.000
z 0.000 0.000 -23.615
Traceless
 xyz
x 4.378 0.000 0.000
y 0.000 -3.365 0.000
z 0.000 0.000 -1.014
Polar
3z2-r2-2.027
x2-y25.162
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.398 0.000 0.000
y 0.000 4.514 0.000
z 0.000 0.000 4.163


<r2> (average value of r2) Å2
<r2> 50.309
(<r2>)1/2 7.093

State 2 (3B1)

Jump to S1C1
Energy calculated at B3LYP/aug-cc-pVQZ
 hartrees
Energy at 0K-489.295304
Energy at 298.15K-489.175518
HF Energy-489.295304
Nuclear repulsion energy98.947717
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/aug-cc-pVQZ
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 804 779 75.16      
2 A1 261 252 12.09      
3 B2 916 888 152.63      

Unscaled Zero Point Vibrational Energy (zpe) 990.5 cm-1
Scaled (by 0.9689) Zero Point Vibrational Energy (zpe) 959.7 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/aug-cc-pVQZ
ABC
1.35746 0.24516 0.20766

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVQZ

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.138      
2 F -0.569      
3 F -0.569      


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 1.256 1.256
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.567 0.000 0.000
y 0.000 -25.069 0.000
z 0.000 0.000 -21.332
Traceless
 xyz
x -0.367 0.000 0.000
y 0.000 -2.620 0.000
z 0.000 0.000 2.986
Polar
3z2-r25.973
x2-y21.502
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.874 0.000 0.000
y 0.000 4.614 0.000
z 0.000 0.000 4.422


<r2> (average value of r2) Å2
<r2> 53.210
(<r2>)1/2 7.295