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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2832.056941
Energy at 298.15K-2832.063224
HF Energy-2832.056941
Nuclear repulsion energy152.495733
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/STO-3G
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 2864 2338 6.49      
2 A1 1167 953 409.04      
3 A1 544 444 12.60      
4 E 2919 2383 13.58      
4 E 2919 2383 13.58      
5 E 1210 988 81.55      
5 E 1210 988 81.55      
6 E 779 636 63.20      
6 E 779 636 63.20      

Unscaled Zero Point Vibrational Energy (zpe) 7194.7 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 5874.4 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 HF/STO-3G
ABC
3.07846 0.14532 0.14532

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.457
Br2 0.000 0.000 0.748
H3 0.000 1.346 -1.920
H4 1.165 -0.673 -1.920
H5 -1.165 -0.673 -1.920

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.20491.42301.42301.4230
Br22.20492.98772.98772.9877
H31.42302.98772.33102.3310
H41.42302.98772.33102.3310
H51.42302.98772.33102.3310

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.964 Br2 Si1 H4 108.964
Br2 Si1 H5 108.964 H3 Si1 H4 109.974
H3 Si1 H5 109.974 H4 Si1 H5 109.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.666      
2 Br -0.254      
3 H -0.137      
4 H -0.137      
5 H -0.137      


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 -2.221 2.221
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.289 0.000 0.000
y 0.000 -30.289 0.000
z 0.000 0.000 -29.505
Traceless
 xyz
x -0.392 0.000 0.000
y 0.000 -0.392 0.000
z 0.000 0.000 0.784
Polar
3z2-r21.567
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 1.410 0.000 0.000
y 0.000 1.410 0.000
z 0.000 0.000 3.574


<r2> (average value of r2) Å2
<r2> 84.540
(<r2>)1/2 9.195