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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: LSDA/TZVP

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/TZVP
 hartrees
Energy at 0K-2861.818178
Energy at 298.15K-2861.824183
HF Energy-2861.818178
Nuclear repulsion energy150.522578
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/TZVP
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 2175 2150 48.22      
2 A1 869 859 270.82      
3 A1 425 420 39.51      
4 E 2201 2175 66.39      
4 E 2201 2175 66.39      
5 E 891 881 41.31      
5 E 891 881 41.31      
6 E 594 587 14.15      
6 E 594 587 14.15      

Unscaled Zero Point Vibrational Energy (zpe) 5419.9 cm-1
Scaled (by 0.9884) Zero Point Vibrational Energy (zpe) 5357.1 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/TZVP
ABC
2.77127 0.14282 0.14282

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.468
Br2 0.000 0.000 0.753
H3 0.000 1.418 -1.937
H4 1.228 -0.709 -1.937
H5 -1.228 -0.709 -1.937

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.22131.49391.49391.4939
Br22.22133.04133.04133.0413
H31.49393.04132.45682.4568
H41.49393.04132.45682.4568
H51.49393.04132.45682.4568

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.294 Br2 Si1 H4 108.294
Br2 Si1 H5 108.294 H3 Si1 H4 110.623
H3 Si1 H5 110.623 H4 Si1 H5 110.623
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.251      
2 Br -0.210      
3 H -0.014      
4 H -0.014      
5 H -0.014      


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 -1.513 1.513
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.827 0.000 0.000
y 0.000 -33.827 0.000
z 0.000 0.000 -31.018
Traceless
 xyz
x -1.404 0.000 0.000
y 0.000 -1.404 0.000
z 0.000 0.000 2.808
Polar
3z2-r25.616
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 5.422 0.000 0.000
y 0.000 5.422 0.000
z 0.000 0.000 8.016


<r2> (average value of r2) Å2
<r2> 87.868
(<r2>)1/2 9.374