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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-2862.453707
Energy at 298.15K-2862.459758
HF Energy-2862.453707
Nuclear repulsion energy150.102966
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 PBEPBEultrafine/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 2191 2161 68.22      
2 A1 916 903 297.41      
3 A1 431 425 35.50      
4 E 2210 2180 111.60      
4 E 2210 2180 111.63      
5 E 912 899 45.77      
5 E 912 899 45.77      
6 E 620 611 16.35      
6 E 620 611 16.34      

Unscaled Zero Point Vibrational Energy (zpe) 5510.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 5434.8 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 PBEPBEultrafine/6-31G**
ABC
2.78805 0.14188 0.14188

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.471
Br2 0.000 0.000 0.756
H3 0.000 1.414 -1.955
H4 1.225 -0.707 -1.955
H5 -1.225 -0.707 -1.955

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.22741.49451.49451.4945
Br22.22743.05763.05763.0576
H31.49453.05762.44942.4494
H41.49453.05762.44942.4494
H51.49453.05762.44942.4494

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.877 Br2 Si1 H4 108.877
Br2 Si1 H5 108.877 H3 Si1 H4 110.059
H3 Si1 H5 110.059 H4 Si1 H5 110.059
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.365      
2 Br -0.228      
3 H -0.046      
4 H -0.046      
5 H -0.046      


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 -1.301 1.301
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.426 0.000 0.000
y 0.000 -33.426 0.000
z 0.000 0.000 -30.594
Traceless
 xyz
x -1.416 0.000 0.000
y 0.000 -1.416 0.000
z 0.000 0.000 2.832
Polar
3z2-r25.663
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 4.892 0.000 0.000
y 0.000 4.892 0.000
z 0.000 0.000 7.460


<r2> (average value of r2) Å2
<r2> 88.067
(<r2>)1/2 9.384