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

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-24.810806
Energy at 298.15K-24.811628
HF Energy-24.810806
Nuclear repulsion energy9.858492
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 B3LYP/CEP-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 235 228 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 117.5 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 113.8 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 B3LYP/CEP-31G
B
0.05008

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 1.046
Br2 0.000 0.000 -1.584

Atom - Atom Distances (Å)
  I1 Br2
I12.6302
Br22.6302

picture of Iodine monobromide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 I 0.108      
2 Br -0.108      


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 1.010 1.010
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.416 0.000 0.000
y 0.000 -36.416 0.000
z 0.000 0.000 -31.728
Traceless
 xyz
x -2.344 0.000 0.000
y 0.000 -2.344 0.000
z 0.000 0.000 4.688
Polar
3z2-r29.375
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 0.492 0.000 0.000
y 0.000 0.492 0.000
z 0.000 0.000 10.571


<r2> (average value of r2) Å2
<r2> 46.995
(<r2>)1/2 6.855