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All results from a given calculation for SiHF3 (trifluorosilane)

using model chemistry: HF/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-76.130656
Energy at 298.15K 
HF Energy-76.130656
Nuclear repulsion energy64.689068
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/CEP-121G*
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 2487 2247 78.72 77.66 0.17 0.30
2 A1 878 793 108.20 3.24 0.00 0.00
3 A1 433 391 92.23 0.57 0.66 0.80
4 E 1023 924 324.28 0.30 0.75 0.86
4 E 1023 924 324.28 0.30 0.75 0.86
5 E 895 808 24.30 7.50 0.75 0.86
5 E 895 808 24.30 7.50 0.75 0.86
6 E 306 277 16.17 0.44 0.75 0.86
6 E 306 277 16.17 0.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4122.9 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 3724.6 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 HF/CEP-121G*
ABC
0.23771 0.23771 0.13711

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.331
H2 0.000 0.000 1.791
F3 0.000 1.469 -0.238
F4 1.272 -0.734 -0.238
F5 -1.272 -0.734 -0.238

Atom - Atom Distances (Å)
  Si1 H2 F3 F4 F5
Si11.46031.57491.57491.5749
H21.46032.50452.50452.5045
F31.57492.50452.54402.5440
F41.57492.50452.54402.5440
F51.57492.50452.54402.5440

picture of trifluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 F3 111.155 H2 Si1 F4 111.155
H2 Si1 F5 111.155 F3 Si1 F4 107.737
F3 Si1 F5 107.737 F4 Si1 F5 107.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.235      
2 H -0.055      
3 F -0.394      
4 F -0.394      
5 F -0.394      


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 1.740 1.740
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.650 0.000 0.000
y 0.000 -28.650 0.000
z 0.000 0.000 -24.497
Traceless
 xyz
x -2.076 0.000 0.000
y 0.000 -2.076 0.000
z 0.000 0.000 4.153
Polar
3z2-r28.306
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 2.505 0.000 0.000
y 0.000 2.505 0.000
z 0.000 0.000 2.670


<r2> (average value of r2) Å2
<r2> 67.164
(<r2>)1/2 8.195