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All results from a given calculation for SiH3I (Silyl Iodide)

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-7179.717268
Energy at 298.15K 
HF Energy-7179.717268
Nuclear repulsion energy200.926870
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 2213 2110 71.36 214.52 0.00 0.00
2 A1 896 854 367.52 16.24 0.67 0.80
3 A1 367 350 20.97 14.52 0.23 0.37
4 E 2233 2129 80.82 80.88 0.75 0.86
4 E 2233 2129 80.83 80.87 0.75 0.86
5 E 909 867 39.53 22.84 0.75 0.86
5 E 909 867 39.53 22.84 0.75 0.86
6 E 584 557 9.15 10.90 0.75 0.86
6 E 584 557 9.15 10.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5463.7 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 5209.7 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 PBEPBE/3-21G*
ABC
2.79591 0.10521 0.10521

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 -1.840
I2 0.000 0.000 0.618
H3 0.000 1.412 -2.334
H4 1.223 -0.706 -2.334
H5 -1.223 -0.706 -2.334

Atom - Atom Distances (Å)
  Si1 I2 H3 H4 H5
Si12.45851.49601.49601.4960
I22.45853.27263.27263.2726
H31.49603.27262.44592.4459
H41.49603.27262.44592.4459
H51.49603.27262.44592.4459

picture of Silyl Iodide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 Si1 H3 109.271 I2 Si1 H4 109.271
I2 Si1 H5 109.271 H3 Si1 H4 109.671
H3 Si1 H5 109.671 H4 Si1 H5 109.671
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 0.186      
2 I -0.159      
3 H -0.009      
4 H -0.009      
5 H -0.009      


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 -0.999 0.999
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -44.258 0.000 0.000
y 0.000 -44.258 0.000
z 0.000 0.000 -39.825
Traceless
 xyz
x -2.216 0.000 0.000
y 0.000 -2.216 0.000
z 0.000 0.000 4.433
Polar
3z2-r28.865
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 5.850 0.000 0.000
y 0.000 5.850 0.000
z 0.000 0.000 10.249


<r2> (average value of r2) Å2
<r2> 116.715
(<r2>)1/2 10.803