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

using model chemistry: MP4=FULL/aug-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 MP4=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-412.821606
Energy at 298.15K 
HF Energy-412.523115
Nuclear repulsion energy25.713553
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/aug-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 598 579        
2 Σu 689 668        
3 Πu 24i 23i        
3 Πu 24i 23i        

Unscaled Zero Point Vibrational Energy (zpe) 620.0 cm-1
Scaled (by 0.9693) Zero Point Vibrational Energy (zpe) 601.0 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/aug-cc-pVTZ
B
0.28089

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-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 2.068
Li3 0.000 0.000 -2.068

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.06812.0681
Li22.06814.1362
Li32.06814.1362

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/aug-cc-pVTZ
 hartrees
Energy at 0K-412.821625
Energy at 298.15K-412.821832
HF Energy-412.523051
Nuclear repulsion energy25.703984
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/aug-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 597 579        
2 A1 29 28        
3 B2 688 667        

Unscaled Zero Point Vibrational Energy (zpe) 657.1 cm-1
Scaled (by 0.9693) Zero Point Vibrational Energy (zpe) 636.9 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/aug-cc-pVTZ
ABC
15.57048 0.28776 0.28254

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.091
Li2 0.000 2.043 -0.242
Li3 0.000 -2.043 -0.242

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07032.0703
Li22.07034.0865
Li32.07034.0865

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 161.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability