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All results from a given calculation for SiHF3 (trifluorosilane)

using model chemistry: HF/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-584.875840
Energy at 298.15K 
HF Energy-584.875840
Nuclear repulsion energy185.716331
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 HF/3-21G
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 2555 2314 121.48 78.37 0.18 0.30
2 A1 922 835 83.41 4.82 0.00 0.00
3 A1 430 390 128.14 1.07 0.75 0.86
4 E 1119 1013 267.49 1.05 0.75 0.86
4 E 1119 1013 267.49 1.05 0.75 0.86
5 E 946 857 62.55 15.68 0.75 0.86
5 E 946 857 62.55 15.68 0.75 0.86
6 E 315 285 23.53 0.67 0.75 0.86
6 E 315 285 23.53 0.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4332.7 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 3923.7 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 HF/3-21G
ABC
0.23106 0.23106 0.13431

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.352
H2 0.000 0.000 1.798
F3 0.000 1.484 -0.249
F4 1.285 -0.742 -0.249
F5 -1.285 -0.742 -0.249

Atom - Atom Distances (Å)
  Si1 H2 F3 F4 F5
Si11.44561.60141.60141.6014
H21.44562.52862.52862.5286
F31.60142.52862.57032.5703
F41.60142.52862.57032.5703
F51.60142.52862.57032.5703

picture of trifluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 F3 112.074 H2 Si1 F4 112.074
H2 Si1 F5 112.074 F3 Si1 F4 106.747
F3 Si1 F5 106.747 F4 Si1 F5 106.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.826      
2 H -0.262      
3 F -0.521      
4 F -0.521      
5 F -0.521      


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 2.451 2.451
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.831 0.000 0.000
y 0.000 -30.831 0.000
z 0.000 0.000 -25.775
Traceless
 xyz
x -2.528 0.000 0.000
y 0.000 -2.528 0.000
z 0.000 0.000 5.056
Polar
3z2-r210.112
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.728 0.000 0.000
y 0.000 1.728 0.000
z 0.000 0.000 2.035


<r2> (average value of r2) Å2
<r2> 84.314
(<r2>)1/2 9.182