return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HBr (hydrogen bromide)

using model chemistry: B2PLYP=FULL/6-31G*

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 B2PLYP=FULL/6-31G*
 hartrees
Energy at 0K-2571.819350
Energy at 298.15K-2571.822327
HF Energy-2571.773056
Nuclear repulsion energy12.906251
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 B2PLYP=FULL/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 Σ 2642 2505 5.36      

Unscaled Zero Point Vibrational Energy (zpe) 1320.7 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 1252.6 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 B2PLYP=FULL/6-31G*
B
8.22592

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.000 -1.395
Br2 0.000 0.000 0.040

Atom - Atom Distances (Å)
  H1 Br2
H11.4351
Br21.4351

picture of hydrogen bromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability