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

using model chemistry: MP2/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 MP2/aug-cc-pVTZ
 hartrees
Energy at 0K-412.725274
Energy at 298.15K 
HF Energy-412.523112
Nuclear repulsion energy25.380834
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-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 577 550 0.00      
2 Σu 670 638 300.98      
3 Πu 28i 27i 133.16      
3 Πu 28i 27i 133.16      

Unscaled Zero Point Vibrational Energy (zpe) 594.9 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 566.9 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 MP2/aug-cc-pVTZ
B
0.27362

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/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 2.095
Li3 0.000 0.000 -2.095

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09542.0954
Li22.09544.1907
Li32.09544.1907

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-pVTZ
 hartrees
Energy at 0K-412.725431
Energy at 298.15K-412.725638
HF Energy-412.522741
Nuclear repulsion energy25.351090
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-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 578 551 15.19      
2 A1 43 41 113.14      
3 B2 657 626 238.17      

Unscaled Zero Point Vibrational Energy (zpe) 638.8 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 608.7 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-pVTZ
ABC
3.27994 0.30807 0.28162

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.198
Li2 0.000 1.975 -0.528
Li3 0.000 -1.975 -0.528

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.10402.1040
Li22.10403.9495
Li32.10403.9495

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 139.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability