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

using model chemistry: PBEPBEultrafine/6-31G*

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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-413.054364
Energy at 298.15K 
HF Energy-413.054364
Nuclear repulsion energy25.375050
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 PBEPBEultrafine/6-31G*
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 571 562 0.00      
2 Σu 662 651 279.85      
3 Πu 62i 61i 101.21      
3 Πu 62i 61i 101.21      

Unscaled Zero Point Vibrational Energy (zpe) 554.2 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 545.1 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 PBEPBEultrafine/6-31G*
B
0.27350

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

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 2.096
Li3 0.000 0.000 -2.096

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.09592.0959
Li22.09594.1917
Li32.09594.1917

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 PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.416      
2 Li 0.208      
3 Li 0.208      


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 -24.043 0.000 0.000
y 0.000 -24.043 0.000
z 0.000 0.000 11.522
Traceless
 xyz
x -17.782 0.000 0.000
y 0.000 -17.782 0.000
z 0.000 0.000 35.564
Polar
3z2-r271.129
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 8.467 0.000 0.000
y 0.000 8.467 0.000
z 0.000 0.000 16.264


<r2> (average value of r2) Å2
<r2> 33.968
(<r2>)1/2 5.828

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-413.056011
Energy at 298.15K-413.056273
HF Energy-413.056011
Nuclear repulsion energy25.307085
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 PBEPBEultrafine/6-31G*
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 574 564 16.45      
2 A1 88 86 68.77      
3 B2 628 618 168.47      

Unscaled Zero Point Vibrational Energy (zpe) 644.7 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 634.1 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 PBEPBEultrafine/6-31G*
ABC
1.47544 0.36300 0.29133

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.295
Li2 0.000 1.819 -0.787
Li3 0.000 -1.819 -0.787

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.11692.1169
Li22.11693.6384
Li32.11693.6384

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 118.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.379      
2 Li 0.190      
3 Li 0.190      


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 -5.263 5.263
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.278 0.000 0.000
y 0.000 3.348 0.000
z 0.000 0.000 -19.045
Traceless
 xyz
x -16.430 0.000 0.000
y 0.000 25.010 0.000
z 0.000 0.000 -8.580
Polar
3z2-r2-17.160
x2-y2-27.626
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.319 0.000 0.000
y 0.000 14.234 0.000
z 0.000 0.000 9.967


<r2> (average value of r2) Å2
<r2> 33.292
(<r2>)1/2 5.770