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

using model chemistry: HSEh1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
2 1 yes D*H 3Σu

State 1 (1Σg)

Jump to S2C1
Energy calculated at HSEh1PBE/3-21G
 hartrees
Energy at 0K-14.862552
Energy at 298.15K-14.862370
HF Energy-14.862552
Nuclear repulsion energy1.726663
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 HSEh1PBE/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 344 331 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 171.9 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 165.6 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 HSEh1PBE/3-21G
B
0.63163

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/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
Li12.7583
Li22.7583

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

State 2 (3Σu)

Jump to S1C1
Energy calculated at HSEh1PBE/3-21G
 hartrees
Energy at 0K-14.833949
Energy at 298.15K-14.833453
HF Energy-14.833949
Nuclear repulsion energy1.325713
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 HSEh1PBE/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 119 115 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 59.5 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 57.3 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 HSEh1PBE/3-21G
B
0.37235

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Li1 0.000 0.000 1.483
Li2 0.000 0.000 -1.483

Atom - Atom Distances (Å)
  Li1 Li2
Li12.9659
Li22.9659

picture of Lithium diatomic state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability