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

using model chemistry: CCD/6-311G*

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 CCD/6-311G*
 hartrees
Energy at 0K-412.669320
Energy at 298.15K 
HF Energy-412.513539
Nuclear repulsion energy25.656118
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 CCD/6-311G*
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 605 578 0.00      
2 Σu 680 650 330.44      
3 Πu 61i 58i 148.33      
3 Πu 61i 58i 148.33      

Unscaled Zero Point Vibrational Energy (zpe) 582.0 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 555.9 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 CCD/6-311G*
B
0.27959

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G*

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 2.073
Li3 0.000 0.000 -2.073

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07292.0729
Li22.07294.1458
Li32.07294.1458

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 CCD/6-311G*
 hartrees
Energy at 0K-412.671602
Energy at 298.15K-412.671962
HF Energy-412.511415
Nuclear repulsion energy25.691866
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 CCD/6-311G*
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 614 586 39.27      
2 A1 115 110 74.33      
3 B2 666 636 192.25      

Unscaled Zero Point Vibrational Energy (zpe) 697.4 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 666.1 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 CCD/6-311G*
ABC
1.47011 0.37841 0.30094

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.296
Li2 0.000 1.782 -0.789
Li3 0.000 -1.782 -0.789

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.08582.0858
Li22.08583.5636
Li32.08583.5636

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 117.352
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability