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All results from a given calculation for Li2S (dilithium sulfide)

using model chemistry: CCSD(T)/cc-pCVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no D*H 1Σg
1 2 yes C2V 1A1

Conformer 1 (D*H)

Jump to S1C2
Energy calculated at CCSD(T)/cc-pCVTZ
 hartrees
Energy at 0K-412.746854
Energy at 298.15K 
HF Energy-412.522421
Nuclear repulsion energy25.490693
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)/cc-pCVTZ
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 588 568        
2 Σu 679 656        
3 Πu 31i 30i        
3 Πu 31i 30i        

Unscaled Zero Point Vibrational Energy (zpe) 602.9 cm-1
Scaled (by 0.966) Zero Point Vibrational Energy (zpe) 582.4 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)/cc-pCVTZ
B
0.27604

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.000
Li2 0.000 0.000 2.086
Li3 0.000 0.000 -2.086

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.08622.0862
Li22.08624.1724
Li32.08624.1724

picture of dilithium sulfide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Li2 S1 Li3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCSD(T)/cc-pCVTZ
 hartrees
Energy at 0K-412.747153
Energy at 298.15K-412.747389
HF Energy-412.521766
Nuclear repulsion energy25.446940
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)/cc-pCVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 588 568        
2 A1 53 51        
3 B2 658 636        

Unscaled Zero Point Vibrational Energy (zpe) 649.6 cm-1
Scaled (by 0.966) Zero Point Vibrational Energy (zpe) 627.5 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 CCSD(T)/cc-pCVTZ
ABC
2.25521 0.33000 0.28787

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.239
Li2 0.000 1.908 -0.637
Li3 0.000 -1.908 -0.637

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09932.0993
Li22.09933.8160
Li32.09933.8160

picture of dilithium sulfide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Li2 S1 Li3 130.704
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability