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

using model chemistry: MP3/TZVP

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 MP3/TZVP
 hartrees
Energy at 0K-412.652721
Energy at 298.15K 
HF Energy-412.503054
Nuclear repulsion energy25.585992
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 MP3/TZVP
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 603 564 0.00      
2 Σu 690 645 333.43      
3 Πu 68i 63i 144.49      
3 Πu 68i 63i 144.49      

Unscaled Zero Point Vibrational Energy (zpe) 579.0 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 541.5 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 MP3/TZVP
B
0.27807

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

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 2.079
Li3 0.000 0.000 -2.079

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07862.0786
Li22.07864.1571
Li32.07864.1571

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 MP3/TZVP
 hartrees
Energy at 0K-412.653884
Energy at 298.15K-412.654177
HF Energy-412.501690
Nuclear repulsion energy25.534533
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 MP3/TZVP
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 603 564 36.21      
2 A1 78 73 97.83      
3 B2 668 625 215.83      

Unscaled Zero Point Vibrational Energy (zpe) 674.4 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 630.7 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 MP3/TZVP
ABC
1.83257 0.34876 0.29300

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.265
Li2 0.000 1.856 -0.706
Li3 0.000 -1.856 -0.706

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09482.0948
Li22.09483.7120
Li32.09483.7120

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 124.755
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability