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

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-489.228865
Energy at 298.15K 
HF Energy-489.228865
Nuclear repulsion energy98.575824
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 BLYP/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 825 819 88.24 4.37 0.57 0.73
2 A1 310 308 13.63 0.83 0.41 0.58
3 B2 862 855 110.91 6.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 998.9 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 990.8 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 BLYP/6-31G*
ABC
0.98162 0.27693 0.21600

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.581
F2 0.000 1.266 -0.452
F3 0.000 -1.266 -0.452

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.63341.6334
F21.63342.5314
F31.63342.5314

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 101.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.652      
2 F -0.326      
3 F -0.326      


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 0.872 0.872
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.646 0.000 0.000
y 0.000 -24.333 0.000
z 0.000 0.000 -22.939
Traceless
 xyz
x 3.990 0.000 0.000
y 0.000 -3.041 0.000
z 0.000 0.000 -0.950
Polar
3z2-r2-1.899
x2-y24.688
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.535 0.000 0.000
y 0.000 4.052 0.000
z 0.000 0.000 3.304


<r2> (average value of r2) Å2
<r2> 51.162
(<r2>)1/2 7.153

State 2 (3B1)

Jump to S1C1
Energy calculated at BLYP/6-31G*
 hartrees
Energy at 0K-489.107786
Energy at 298.15K-488.987959
HF Energy-489.107786
Nuclear repulsion energy96.758884
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 BLYP/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 763 757 30.13      
2 A1 250 248 11.85      
3 B2 903 896 90.89      

Unscaled Zero Point Vibrational Energy (zpe) 958.1 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 950.3 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 BLYP/6-31G*
ABC
1.42094 0.22781 0.19634

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.487
F2 0.000 1.376 -0.379
F3 0.000 -1.376 -0.379

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.62531.6253
F21.62532.7517
F31.62532.7517

picture of Silicon difluoride state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 115.674
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.602      
2 F -0.301      
3 F -0.301      


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 1.303 1.303
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.850 0.000 0.000
y 0.000 -24.300 0.000
z 0.000 0.000 -20.263
Traceless
 xyz
x -0.569 0.000 0.000
y 0.000 -2.744 0.000
z 0.000 0.000 3.312
Polar
3z2-r26.625
x2-y21.450
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.021 0.000 0.000
y 0.000 3.519 0.000
z 0.000 0.000 2.830


<r2> (average value of r2) Å2
<r2> 54.887
(<r2>)1/2 7.409