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: PBE1PBE/TZVP

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 PBE1PBE/TZVP
 hartrees
Energy at 0K-2574.455922
Energy at 298.15K-2574.458900
HF Energy-2574.455922
Nuclear repulsion energy13.044886
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 PBE1PBE/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 Σ 2672 2564 9.36      

Unscaled Zero Point Vibrational Energy (zpe) 1335.8 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 1281.8 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 PBE1PBE/TZVP
B
8.40359

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.000 -1.380
Br2 0.000 0.000 0.039

Atom - Atom Distances (Å)
  H1 Br2
H11.4198
Br21.4198

picture of hydrogen bromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.145      
2 Br -0.145      


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 -1.102 1.102
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.916 0.000 0.000
y 0.000 -19.916 0.000
z 0.000 0.000 -15.539
Traceless
 xyz
x -2.189 0.000 0.000
y 0.000 -2.189 0.000
z 0.000 0.000 4.377
Polar
3z2-r28.755
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 1.681 0.000 0.000
y 0.000 1.681 0.000
z 0.000 0.000 2.797


<r2> (average value of r2) Å2
<r2> 13.488
(<r2>)1/2 3.673