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All results from a given calculation for HBr (hydrogen bromide)

using model chemistry: HF/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-2560.620781
Energy at 298.15K-2560.623758
HF Energy-2560.620781
Nuclear repulsion energy12.930050
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 HF/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 2475 2241 2.74      

Unscaled Zero Point Vibrational Energy (zpe) 1237.3 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 1120.5 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 HF/3-21G
B
8.25628

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.000 -1.393
Br2 0.000 0.000 0.040

Atom - Atom Distances (Å)
  H1 Br2
H11.4324
Br21.4324

picture of hydrogen bromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.097      
2 Br -0.097      


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 -1.317 1.317
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.692 0.000 0.000
y 0.000 -19.692 0.000
z 0.000 0.000 -16.186
Traceless
 xyz
x -1.753 0.000 0.000
y 0.000 -1.753 0.000
z 0.000 0.000 3.506
Polar
3z2-r27.011
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 0.432 0.000 0.000
y 0.000 0.432 0.000
z 0.000 0.000 2.634


<r2> (average value of r2) Å2
<r2> 13.564
(<r2>)1/2 3.683