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All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-2865.434708
Energy at 298.15K-2865.440789
HF Energy-2865.434708
Nuclear repulsion energy150.000583
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 B3PW91/6-311G*
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 2244 2160 59.64      
2 A1 940 905 367.87      
3 A1 420 404 42.94      
4 E 2259 2174 98.88      
4 E 2259 2174 98.89      
5 E 948 912 62.62      
5 E 948 912 62.62      
6 E 633 609 20.35      
6 E 633 609 20.35      

Unscaled Zero Point Vibrational Energy (zpe) 5640.0 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 5429.7 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 B3PW91/6-311G*
ABC
2.82408 0.14144 0.14144

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.476
Br2 0.000 0.000 0.757
H3 0.000 1.405 -1.947
H4 1.217 -0.703 -1.947
H5 -1.217 -0.703 -1.947

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.23301.48211.48211.4821
Br22.23303.04773.04773.0477
H31.48213.04772.43372.4337
H41.48213.04772.43372.4337
H51.48213.04772.43372.4337

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.549 Br2 Si1 H4 108.549
Br2 Si1 H5 108.549 H3 Si1 H4 110.378
H3 Si1 H5 110.378 H4 Si1 H5 110.378
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.368      
2 Br -0.266      
3 H -0.034      
4 H -0.034      
5 H -0.034      


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 -1.628 1.628
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.786 0.000 0.000
y 0.000 -33.786 0.000
z 0.000 0.000 -30.992
Traceless
 xyz
x -1.397 0.000 0.000
y 0.000 -1.397 0.000
z 0.000 0.000 2.794
Polar
3z2-r25.588
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 4.882 0.000 0.000
y 0.000 4.882 0.000
z 0.000 0.000 7.432


<r2> (average value of r2) Å2
<r2> 88.378
(<r2>)1/2 9.401