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

using model chemistry: CCSD(T)=FULL/cc-pV(T+d)Z

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)=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-412.876257
Energy at 298.15K 
HF Energy-412.522381
Nuclear repulsion energy25.698910
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)=FULL/cc-pV(T+d)Z
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 600 575        
2 Σu 691 663        
3 Πu 10i 9i        
3 Πu 10i 9i        

Unscaled Zero Point Vibrational Energy (zpe) 635.8 cm-1
Scaled (by 0.9591) Zero Point Vibrational Energy (zpe) 609.8 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)=FULL/cc-pV(T+d)Z
B
0.28057

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pV(T+d)Z

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 2.069
Li3 0.000 0.000 -2.069

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.06932.0693
Li22.06934.1386
Li32.06934.1386

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)=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-412.876300
Energy at 298.15K-412.876503
HF Energy-412.522005
Nuclear repulsion energy25.667081
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)=FULL/cc-pV(T+d)Z
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 599 574        
2 A1 29 28        
3 B2 677 650        

Unscaled Zero Point Vibrational Energy (zpe) 652.6 cm-1
Scaled (by 0.9591) Zero Point Vibrational Energy (zpe) 625.9 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)=FULL/cc-pV(T+d)Z
ABC
3.27355 0.31690 0.28893

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.198
Li2 0.000 1.947 -0.528
Li3 0.000 -1.947 -0.528

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07822.0782
Li22.07823.8941
Li32.07823.8941

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 139.067
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability