return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for Li2F2 (Lithium fluoride dimer)

using model chemistry: CCSD(T)/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at CCSD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-214.648412
Energy at 298.15K 
HF Energy-214.065152
Nuclear repulsion energy50.951858
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 CCSD(T)/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 358 347        
2 Ag 659 639        
3 B1u 665 645        
4 B2u 566 549        
5 B3g 558 542        
6 B3u 287 278        

Unscaled Zero Point Vibrational Energy (zpe) 1546.0 cm-1
Scaled (by 0.9699) Zero Point Vibrational Energy (zpe) 1499.4 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 CCSD(T)/aug-cc-pVTZ
ABC
0.95713 0.24874 0.19743

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/aug-cc-pVTZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Li1 0.000 1.120 0.000
Li2 0.000 -1.120 0.000
F3 0.000 0.000 1.336
F4 0.000 0.000 -1.336

Atom - Atom Distances (Å)
  Li1 Li2 F3 F4
Li12.24071.74321.7432
Li22.24071.74321.7432
F31.74321.74322.6710
F41.74321.74322.6710

picture of Lithium fluoride dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Li1 F3 Li2 79.986 Li1 F4 Li2 79.986
F3 Li1 F4 100.014 F3 Li2 F4 100.014
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability