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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: LSDA/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at LSDA/6-31G
 hartrees
Energy at 0K-2859.187709
Energy at 298.15K-2859.193688
HF Energy-2859.187709
Nuclear repulsion energy146.990453
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 LSDA/6-31G
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 2142 2099 59.13      
2 A1 866 849 228.38      
3 A1 411 403 25.06      
4 E 2186 2142 104.46      
4 E 2186 2142 104.46      
5 E 871 853 32.48      
5 E 871 853 32.48      
6 E 601 589 18.57      
6 E 601 589 18.57      

Unscaled Zero Point Vibrational Energy (zpe) 5368.2 cm-1
Scaled (by 0.9797) Zero Point Vibrational Energy (zpe) 5259.2 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 LSDA/6-31G
ABC
2.71014 0.13576 0.13576

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.510
Br2 0.000 0.000 0.772
H3 0.000 1.434 -1.967
H4 1.242 -0.717 -1.967
H5 -1.242 -0.717 -1.967

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.28211.50551.50551.5055
Br22.28213.09243.09243.0924
H31.50553.09242.48432.4843
H41.50553.09242.48432.4843
H51.50553.09242.48432.4843

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 107.690 Br2 Si1 H4 107.690
Br2 Si1 H5 107.690 H3 Si1 H4 111.192
H3 Si1 H5 111.192 H4 Si1 H5 111.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.312      
2 Br -0.238      
3 H -0.025      
4 H -0.025      
5 H -0.025      


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 -2.253 2.253
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.891 0.000 0.000
y 0.000 -33.891 0.000
z 0.000 0.000 -31.099
Traceless
 xyz
x -1.396 0.000 0.000
y 0.000 -1.396 0.000
z 0.000 0.000 2.792
Polar
3z2-r25.584
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 4.025 0.000 0.000
y 0.000 4.025 0.000
z 0.000 0.000 7.504


<r2> (average value of r2) Å2
<r2> 91.159
(<r2>)1/2 9.548