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

using model chemistry: MP2/aug-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 MP2/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-412.725834
Energy at 298.15K 
HF Energy-412.523136
Nuclear repulsion energy25.382594
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 MP2/aug-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 577 577 0.00      
2 Σu 669 669 301.50      
3 Πu 30i 30i 132.86      
3 Πu 30i 30i 132.86      

Unscaled Zero Point Vibrational Energy (zpe) 593.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 593.1 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 MP2/aug-cc-pV(T+d)Z
B
0.27366

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-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 2.096
Li3 0.000 0.000 -2.096

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09652.0965
Li22.09654.1930
Li32.09654.1930

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 MP2/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-412.726028
Energy at 298.15K-412.726311
HF Energy-412.522765
Nuclear repulsion energy25.352226
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 MP2/aug-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 578 578 16.66      
2 A1 46 46 110.90      
3 B2 656 656 233.70      

Unscaled Zero Point Vibrational Energy (zpe) 639.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 639.7 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 MP2/aug-cc-pV(T+d)Z
ABC
3.00666 0.31172 0.28244

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.444
Li2 0.000 1.314 -1.184
Li3 0.000 -1.314 -1.184

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09212.0921
Li22.09212.6271
Li32.09212.6271

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 77.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability