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All results from a given calculation for SiHF3 (trifluorosilane)

using model chemistry: PBEPBE/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 PBEPBE/3-21G*
 hartrees
Energy at 0K-586.313583
Energy at 298.15K 
HF Energy-586.313583
Nuclear repulsion energy185.899822
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 PBEPBE/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 2351 2241 99.01 70.44 0.19 0.32
2 A1 872 832 54.41 5.96 0.00 0.00
3 A1 408 389 55.18 1.22 0.74 0.85
4 E 1073 1024 181.45 0.53 0.75 0.86
4 E 1073 1023 181.44 0.53 0.75 0.86
5 E 857 817 22.93 10.90 0.75 0.86
5 E 857 817 22.93 10.90 0.75 0.86
6 E 300 286 10.06 0.76 0.75 0.86
6 E 300 286 10.06 0.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4045.5 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 3857.4 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 PBEPBE/3-21G*
ABC
0.23160 0.23160 0.13352

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.334
H2 0.000 0.000 1.812
F3 0.000 1.488 -0.241
F4 1.289 -0.744 -0.241
F5 -1.289 -0.744 -0.241

Atom - Atom Distances (Å)
  Si1 H2 F3 F4 F5
Si11.47721.59551.59551.5955
H21.47722.53512.53512.5351
F31.59552.53512.57792.5779
F41.59552.53512.57792.5779
F51.59552.53512.57792.5779

picture of trifluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 F3 111.123 H2 Si1 F4 111.123
H2 Si1 F5 111.123 F3 Si1 F4 107.770
F3 Si1 F5 107.770 F4 Si1 F5 107.770
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.864      
2 H -0.106      
3 F -0.253      
4 F -0.253      
5 F -0.253      


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 1.162 1.162
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.334 0.000 0.000
y 0.000 -28.334 0.000
z 0.000 0.000 -25.640
Traceless
 xyz
x -1.347 0.000 0.000
y 0.000 -1.347 0.000
z 0.000 0.000 2.694
Polar
3z2-r25.388
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 2.361 0.000 0.000
y 0.000 2.362 0.000
z 0.000 0.000 2.473


<r2> (average value of r2) Å2
<r2> 83.356
(<r2>)1/2 9.130