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

using model chemistry: MP4=FULL/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-412.675684
Energy at 298.15K 
HF Energy-412.504200
Nuclear repulsion energy25.252452
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/cc-pVDZ
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 562 542        
2 Σu 644 622        
3 Πu 76i 73i        
3 Πu 76i 73i        

Unscaled Zero Point Vibrational Energy (zpe) 527.2 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 508.8 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 MP4=FULL/cc-pVDZ
B
0.27091

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

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 2.106
Li3 0.000 0.000 -2.106

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.10592.1059
Li22.10594.2117
Li32.10594.2117

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/cc-pVDZ
 hartrees
Energy at 0K-412.678221
Energy at 298.15K-412.678518
HF Energy-412.503576
Nuclear repulsion energy25.128434
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/cc-pVDZ
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 566 547        
2 A1 106 102        
3 B2 625 603        

Unscaled Zero Point Vibrational Energy (zpe) 648.4 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 625.8 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 MP4=FULL/cc-pVDZ
ABC
1.38899 0.36355 0.28813

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.304
Li2 0.000 1.818 -0.811
Li3 0.000 -1.818 -0.811

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.13292.1329
Li22.13293.6357
Li32.13293.6357

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 116.927
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability