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

using model chemistry: MP2=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
1 2 no C2V 1A1

Conformer 1 (D*H)

Jump to S1C2
Energy calculated at MP2=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-412.842989
Energy at 298.15K-412.842691
HF Energy-412.526083
Nuclear repulsion energy25.643567
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=FULL/aug-cc-pVQZ
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 589 563 0.00      
2 Σu 663 634 302.02      
3 Πu 11 11 133.05      
3 Πu 11 11 133.05      

Unscaled Zero Point Vibrational Energy (zpe) 636.7 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 609.0 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 MP2=FULL/aug-cc-pVQZ
B
0.27932

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

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 2.074
Li3 0.000 0.000 -2.074

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07392.0739
Li22.07394.1478
Li32.07394.1478

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=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-412.842989
Energy at 298.15K-412.843139
HF Energy-412.526082
Nuclear repulsion energy25.644332
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=FULL/aug-cc-pVQZ
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 589 563 0.00      
2 A1 10 10 133.05      
3 B2 663 634 302.02      

Unscaled Zero Point Vibrational Energy (zpe) 630.9 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 603.3 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 MP2=FULL/aug-cc-pVQZ
B
0.27934

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 -0.001
Li2 0.000 2.074 0.002
Li3 0.000 -2.074 0.002

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07382.0738
Li22.07384.1477
Li32.07384.1477

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 179.848
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability