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 HBr (hydrogen bromide)

using model chemistry: BLYP/aug-cc-pVTZ

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 BLYP/aug-cc-pVTZ
 hartrees
Energy at 0K-2574.829644
Energy at 298.15K-2574.832622
HF Energy-2574.829644
Nuclear repulsion energy12.900301
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 BLYP/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 Σ 2516 2507 8.96      

Unscaled Zero Point Vibrational Energy (zpe) 1257.8 cm-1
Scaled (by 0.9966) Zero Point Vibrational Energy (zpe) 1253.6 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 BLYP/aug-cc-pVTZ
B
8.21833

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.000 -1.396
Br2 0.000 0.000 0.040

Atom - Atom Distances (Å)
  H1 Br2
H11.4357
Br21.4357

picture of hydrogen bromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.010      
2 Br -0.010      


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 -0.794 0.794
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.151 0.000 0.000
y 0.000 -20.151 0.000
z 0.000 0.000 -16.105
Traceless
 xyz
x -2.023 0.000 0.000
y 0.000 -2.023 0.000
z 0.000 0.000 4.046
Polar
3z2-r28.092
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 3.665 0.000 0.000
y 0.000 3.665 0.000
z 0.000 0.000 3.917


<r2> (average value of r2) Å2
<r2> 13.748
(<r2>)1/2 3.708