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All results from a given calculation for HSiBr (monobromosilylene)

using model chemistry: G3B3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G3B3
 hartrees
Energy at 0K-2863.495401
Energy at 298.15K-2863.491200
HF Energy-2863.966004
Nuclear repulsion energy125.077733
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 B3LYP/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 A' 2032 1952 328.68 175.29 0.47 0.64
2 A' 793 762 52.63 16.74 0.75 0.86
3 A' 412 396 64.62 22.13 0.34 0.51

Unscaled Zero Point Vibrational Energy (zpe) 1618.7 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 1554.4 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 B3LYP/6-31G*
ABC
7.46994 0.15506 0.15191

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.031 1.579 0.000
Br2 0.031 -0.680 0.000
H3 -1.496 1.705 0.000

Atom - Atom Distances (Å)
  Si1 Br2 H3
Si12.25931.5318
Br22.25932.8319
H31.53182.8319

picture of monobromosilylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 Si1 H3 94.271
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.353      
2 Br -0.253      
3 H -0.100      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.356 1.001 0.000 1.062
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 76.069
(<r2>)1/2 8.722