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All results from a given calculation for I2 (Iodine diatomic)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-13776.061124
Energy at 298.15K 
HF Energy-13775.835997
Nuclear repulsion energy548.379732
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 231 220 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 115.6 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 110.0 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 MP2/3-21G*
B
0.03616

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 1.355
I2 0.000 0.000 -1.355

Atom - Atom Distances (Å)
  I1 I2
I12.7106
I22.7106

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