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

using model chemistry: HF/CEP-31G

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 HF/CEP-31G
 hartrees
Energy at 0K-10.427540
Energy at 298.15K-10.427555
HF Energy-10.427540
Nuclear repulsion energy3.130203
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 HF/CEP-31G
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 569 513 0.00      
2 Σu 680 613 361.86      
3 Πu 96 87 184.29      
3 Πu 96 87 184.29      

Unscaled Zero Point Vibrational Energy (zpe) 720.6 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 649.6 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 HF/CEP-31G
B
0.26903

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

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 2.113
Li3 0.000 0.000 -2.113

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.11322.1132
Li22.11324.2264
Li32.11324.2264

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
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.664      
2 Li 0.332      
3 Li 0.332      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.817 0.000 0.000
y 0.000 -22.817 0.000
z 0.000 0.000 16.022
Traceless
 xyz
x -19.419 0.000 0.000
y 0.000 -19.419 0.000
z 0.000 0.000 38.839
Polar
3z2-r277.678
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.157 0.000 0.000
y 0.000 5.157 0.000
z 0.000 0.000 10.558


<r2> (average value of r2) Å2
<r2> 15.096
(<r2>)1/2 3.885

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-10.427540
Energy at 298.15K-10.427843
HF Energy-10.427540
Nuclear repulsion energy3.130189
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 HF/CEP-31G
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 569 513 0.00      
2 A1 96 87 184.29      
3 B2 680 613 361.86      

Unscaled Zero Point Vibrational Energy (zpe) 672.6 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 606.3 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 HF/CEP-31G
B
0.26903

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 -0.000
Li2 0.000 2.113 0.000
Li3 0.000 -2.113 0.000

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.11322.1132
Li22.11324.2264
Li32.11324.2264

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 179.992
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.664      
2 Li 0.332      
3 Li 0.332      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.001 0.001
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.817 0.000 0.000
y 0.000 16.022 0.000
z 0.000 0.000 -22.817
Traceless
 xyz
x -19.420 0.000 0.000
y 0.000 38.839 0.000
z 0.000 0.000 -19.420
Polar
3z2-r2-38.839
x2-y2-38.839
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.157 0.000 0.000
y 0.000 10.558 0.000
z 0.000 0.000 5.157


<r2> (average value of r2) Å2
<r2> 15.096
(<r2>)1/2 3.885