return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for SiH3Br (bromosilane)

using model chemistry: B3PW91/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 B3PW91/TZVP
 hartrees
Energy at 0K-2865.470059
Energy at 298.15K-2865.476129
HF Energy-2865.470059
Nuclear repulsion energy149.550820
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/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 2232 2153 60.70      
2 A1 922 889 336.00      
3 A1 420 405 43.82      
4 E 2252 2171 93.03      
4 E 2252 2171 93.04      
5 E 941 907 56.57      
5 E 941 907 56.57      
6 E 623 600 17.36      
6 E 623 600 17.36      

Unscaled Zero Point Vibrational Energy (zpe) 5601.7 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 5401.8 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 B3PW91/TZVP
ABC
2.80278 0.14059 0.14059

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.481
Br2 0.000 0.000 0.759
H3 0.000 1.410 -1.947
H4 1.221 -0.705 -1.947
H5 -1.221 -0.705 -1.947

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.24041.48551.48551.4855
Br22.24043.05213.05213.0521
H31.48553.05212.44292.4429
H41.48553.05212.44292.4429
H51.48553.05212.44292.4429

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.292 Br2 Si1 H4 108.292
Br2 Si1 H5 108.292 H3 Si1 H4 110.624
H3 Si1 H5 110.624 H4 Si1 H5 110.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.413      
2 Br -0.250      
3 H -0.054      
4 H -0.054      
5 H -0.054      


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 -1.610 1.610
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.707 0.000 0.000
y 0.000 -33.707 0.000
z 0.000 0.000 -30.856
Traceless
 xyz
x -1.425 0.000 0.000
y 0.000 -1.425 0.000
z 0.000 0.000 2.851
Polar
3z2-r25.702
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 5.158 0.000 0.000
y 0.000 5.158 0.000
z 0.000 0.000 7.742


<r2> (average value of r2) Å2
<r2> 88.696
(<r2>)1/2 9.418