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All results from a given calculation for IBr (Iodine monobromide)

using model chemistry: ROMP2/Def2TZVPP

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 ROMP2/Def2TZVPP
 hartrees
Energy at 0K-2869.848091
Energy at 298.15K 
HF Energy-2869.082084
Nuclear repulsion energy188.607728
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 ROMP2/Def2TZVPP
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 285 285        

Unscaled Zero Point Vibrational Energy (zpe) 142.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 142.3 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 ROMP2/Def2TZVPP
B
0.05749

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 0.976
Br2 0.000 0.000 -1.479

Atom - Atom Distances (Å)
  I1 Br2
I12.4549
Br22.4549

picture of Iodine monobromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 I 0.146      
2 Br -0.146      


Electric dipole moments


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> 128.029
(<r2>)1/2 11.315