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: PBEPBEultrafine/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-2864.996486
Energy at 298.15K-2865.002500
HF Energy-2864.996486
Nuclear repulsion energy149.261836
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/aug-cc-pVTZ
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 2172 2147 55.22      
2 A1 882 872 259.19      
3 A1 412 407 36.77      
4 E 2193 2169 74.77      
4 E 2193 2169 74.79      
5 E 906 896 41.84      
5 E 906 896 41.85      
6 E 600 593 11.71      
6 E 600 593 11.71      

Unscaled Zero Point Vibrational Energy (zpe) 5430.8 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 5369.9 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/aug-cc-pVTZ
ABC
2.77809 0.14014 0.14014

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 -1.483
Br2 0.000 0.000 0.761
H3 0.000 1.417 -1.953
H4 1.227 -0.708 -1.953
H5 -1.227 -0.708 -1.953

Atom - Atom Distances (Å)
  Si1 Br2 H3 H4 H5
Si12.24351.49281.49281.4928
Br22.24353.06153.06153.0615
H31.49283.06152.45382.4538
H41.49283.06152.45382.4538
H51.49283.06152.45382.4538

picture of bromosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 108.372 Br2 Si1 H4 108.372
Br2 Si1 H5 108.372 H3 Si1 H4 110.548
H3 Si1 H5 110.548 H4 Si1 H5 110.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.669      
2 Br -0.250      
3 H -0.140      
4 H -0.140      
5 H -0.140      


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 -1.290 1.290
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.943 0.000 0.000
y 0.000 -33.943 0.000
z 0.000 0.000 -31.357
Traceless
 xyz
x -1.293 0.000 0.000
y 0.000 -1.293 0.000
z 0.000 0.000 2.586
Polar
3z2-r25.172
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 7.001 0.000 0.000
y 0.000 7.002 0.000
z 0.000 0.000 9.633


<r2> (average value of r2) Å2
<r2> 89.164
(<r2>)1/2 9.443