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

using model chemistry: MP4=FULL/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 MP4=FULL/6-311G**
 hartrees
Energy at 0K-412.827589
Energy at 298.15K 
HF Energy-412.513535
Nuclear repulsion energy25.662106
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 MP4=FULL/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 601 578        
2 Σu 676 650        
3 Πu 64i 61i        
3 Πu 64i 61i        

Unscaled Zero Point Vibrational Energy (zpe) 574.4 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 552.3 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 MP4=FULL/6-311G**
B
0.27977

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/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 2.072
Li3 0.000 0.000 -2.072

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07222.0722
Li22.07224.1445
Li32.07224.1445

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 MP4=FULL/6-311G**
 hartrees
Energy at 0K-412.830776
Energy at 298.15K-412.831152
HF Energy-412.510860
Nuclear repulsion energy25.695625
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 MP4=FULL/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 609 585        
2 A1 126 121        
3 B2 657 631        

Unscaled Zero Point Vibrational Energy (zpe) 695.7 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 668.9 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 MP4=FULL/6-311G**
ABC
1.28987 0.39764 0.30394

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.316
Li2 0.000 1.738 -0.842
Li3 0.000 -1.738 -0.842

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.08842.0884
Li22.08843.4763
Li32.08843.4763

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 112.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability