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All results from a given calculation for Li2 (Lithium diatomic)

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-14.859796
Energy at 298.15K-14.859612
HF Energy-14.859796
Nuclear repulsion energy1.726817
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/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 343 329 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 171.4 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 164.5 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/3-21G*
B
0.63175

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Li1 0.000 0.000 1.379
Li2 0.000 0.000 -1.379

Atom - Atom Distances (Å)
  Li1 Li2
Li12.7580
Li22.7580

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