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

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

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-pVTZ
 hartrees
Energy at 0K-412.744704
Energy at 298.15K 
HF Energy-412.522380
Nuclear repulsion energy25.487477
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-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 Σg 588 573        
2 Σu 679 662        
3 Πu 28i 27i        
3 Πu 28i 27i        

Unscaled Zero Point Vibrational Energy (zpe) 605.9 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 590.6 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 CCSD(T)/cc-pVTZ
B
0.27597

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

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
S12.08642.0864
Li22.08644.1729
Li32.08644.1729

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-pVTZ
 hartrees
Energy at 0K-412.744942
Energy at 298.15K-412.745169
HF Energy-412.521725
Nuclear repulsion energy25.443337
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-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 A1 588 573        
2 A1 49 48        
3 B2 659 643        

Unscaled Zero Point Vibrational Energy (zpe) 648.3 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 631.9 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-pVTZ
ABC
2.38708 0.32631 0.28707

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.232
Li2 0.000 1.919 -0.619
Li3 0.000 -1.919 -0.619

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09902.0990
Li22.09903.8375
Li32.09903.8375

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 132.165
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability