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: BLYP/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 BLYP/TZVP
 hartrees
Energy at 0K-489.348419
Energy at 298.15K 
HF Energy-489.348419
Nuclear repulsion energy97.334916
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/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 772 770 128.16 5.38 0.53 0.69
2 A1 306 305 14.70 1.07 0.51 0.67
3 B2 778 776 170.47 7.65 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 927.6 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 925.3 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/TZVP
ABC
0.93388 0.27335 0.21146

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.595
F2 0.000 1.274 -0.463
F3 0.000 -1.274 -0.463

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.65631.6563
F21.65632.5480
F31.65632.5480

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 100.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP 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 1.567 1.567
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.000 0.000 0.000
y 0.000 -25.737 0.000
z 0.000 0.000 -23.284
Traceless
 xyz
x 4.510 0.000 0.000
y 0.000 -4.095 0.000
z 0.000 0.000 -0.416
Polar
3z2-r2-0.831
x2-y25.736
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.604 0.000 0.000
y 0.000 4.263 0.000
z 0.000 0.000 3.645


<r2> (average value of r2) Å2
<r2> 52.407
(<r2>)1/2 7.239

State 2 (3B1)

Jump to S1C1
Energy calculated at BLYP/TZVP
 hartrees
Energy at 0K-489.229552
Energy at 298.15K-489.109674
HF Energy-489.229552
Nuclear repulsion energy95.834795
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/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 723 721 52.61      
2 A1 230 230 13.65      
3 B2 839 837 139.73      

Unscaled Zero Point Vibrational Energy (zpe) 895.8 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 893.6 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/TZVP
ABC
1.35014 0.22568 0.19336

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.539      
2 F -0.270      
3 F -0.270      


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 1.644 1.644
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.437 0.000 0.000
y 0.000 -25.786 0.000
z 0.000 0.000 -20.812
Traceless
 xyz
x -0.138 0.000 0.000
y 0.000 -3.662 0.000
z 0.000 0.000 3.800
Polar
3z2-r27.599
x2-y22.349
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.186 0.000 0.000
y 0.000 3.903 0.000
z 0.000 0.000 3.093


<r2> (average value of r2) Å2
<r2> 56.069
(<r2>)1/2 7.488