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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: B3PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/cc-pVTZ
 hartrees
Energy at 0K-2865.528926
Energy at 298.15K-2865.535003
HF Energy-2865.528926
Nuclear repulsion energy150.153101
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 B3PW91/cc-pVTZ
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 2233 2148 57.98      
2 A1 921 885 289.35      
3 A1 423 406 40.78      
4 E 2252 2165 86.49      
4 E 2252 2165 86.50      
5 E 941 905 50.09      
5 E 941 905 50.09      
6 E 623 600 14.58      
6 E 623 600 14.58      

Unscaled Zero Point Vibrational Energy (zpe) 5604.2 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 5389.0 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 B3PW91/cc-pVTZ
ABC
2.81782 0.14178 0.14178

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.474
Br2 0.000 0.000 0.756
H3 0.000 1.407 -1.941
H4 1.218 -0.703 -1.941
H5 -1.218 -0.703 -1.941

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.23071.48211.48211.4821
Br22.23073.04233.04233.0423
H31.48213.04232.43642.4364
H41.48213.04232.43642.4364
H51.48213.04232.43642.4364

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.362 Br2 Si1 H4 108.362
Br2 Si1 H5 108.362 H3 Si1 H4 110.558
H3 Si1 H5 110.558 H4 Si1 H5 110.558
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.237      
2 Br -0.209      
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 -1.362 1.362
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.665 0.000 0.000
y 0.000 -33.665 0.000
z 0.000 0.000 -31.032
Traceless
 xyz
x -1.316 0.000 0.000
y 0.000 -1.316 0.000
z 0.000 0.000 2.632
Polar
3z2-r25.265
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 5.792 0.000 0.000
y 0.000 5.792 0.000
z 0.000 0.000 8.539


<r2> (average value of r2) Å2
<r2> 88.172
(<r2>)1/2 9.390