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

using model chemistry: MP2/6-311G**

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 MP2/6-311G**
 hartrees
Energy at 0K-412.658568
Energy at 298.15K 
HF Energy-412.513565
Nuclear repulsion energy25.591955
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 MP2/6-311G**
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 599 569 0.00      
2 Σu 675 641 317.61      
3 Πu 66i 63i 143.65      
3 Πu 66i 63i 143.65      

Unscaled Zero Point Vibrational Energy (zpe) 570.6 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 542.1 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 MP2/6-311G**
B
0.27819

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

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 2.078
Li3 0.000 0.000 -2.078

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07812.0781
Li22.07814.1562
Li32.07814.1562

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 MP2/6-311G**
 hartrees
Energy at 0K-412.661313
Energy at 298.15K-412.661678
HF Energy-412.511293
Nuclear repulsion energy25.631324
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 MP2/6-311G**
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 609 579 34.69      
2 A1 119 113 69.57      
3 B2 660 627 178.66      

Unscaled Zero Point Vibrational Energy (zpe) 694.1 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 659.5 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 MP2/6-311G**
ABC
1.40401 0.38217 0.30040

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.303
Li2 0.000 1.773 -0.807
Li3 0.000 -1.773 -0.807

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09162.0916
Li22.09163.5460
Li32.09163.5460

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 115.921
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability