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

using model chemistry: PBEPBEultrafine/aug-cc-pV(T+d)Z

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/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-413.100970
Energy at 298.15K 
HF Energy-413.100970
Nuclear repulsion energy25.665957
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/aug-cc-pV(T+d)Z
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 584 584 0.00      
2 Σu 675 675 268.75      
3 Πu 28i 28i 116.35      
3 Πu 28i 28i 116.35      

Unscaled Zero Point Vibrational Energy (zpe) 601.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 601.6 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 PBEPBEultrafine/aug-cc-pV(T+d)Z
B
0.27981

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pV(T+d)Z

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 2.080
Li3 0.000 0.000 -2.080

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.07992.0799
Li22.07994.1597
Li32.07994.1597

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/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.118      
2 Li 0.059      
3 Li 0.059      


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 -24.036 0.000 0.000
y 0.000 -24.036 0.000
z 0.000 0.000 12.275
Traceless
 xyz
x -18.155 0.000 0.000
y 0.000 -18.155 0.000
z 0.000 0.000 36.311
Polar
3z2-r272.621
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 11.059 0.000 0.000
y 0.000 11.059 0.000
z 0.000 0.000 13.147


<r2> (average value of r2) Å2
<r2> 33.214
(<r2>)1/2 5.763

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at PBEPBEultrafine/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-413.100973
Energy at 298.15K 
HF Energy-413.100973
Nuclear repulsion energy25.665325
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/aug-cc-pV(T+d)Z
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 584 584 0.09      
2 A1 28i 28i 116.21      
3 B2 675 675 268.08      

Unscaled Zero Point Vibrational Energy (zpe) 615.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 615.2 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/aug-cc-pV(T+d)Z
ABC
360.49066 0.28009 0.27987

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.019
Li2 0.000 2.079 -0.051
Li3 0.000 -2.079 -0.051

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.08002.0800
Li22.08004.1575
Li32.08004.1575

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 176.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.114      
2 Li 0.057      
3 Li 0.057      


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 -0.359 0.359
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.036 0.000 0.000
y 0.000 12.241 0.000
z 0.000 0.000 -24.014
Traceless
 xyz
x -18.150 0.000 0.000
y 0.000 36.266 0.000
z 0.000 0.000 -18.117
Polar
3z2-r2-36.234
x2-y2-36.277
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 11.061 0.000 0.000
y 0.000 13.141 0.000
z 0.000 0.000 11.063


<r2> (average value of r2) Å2
<r2> 33.212
(<r2>)1/2 5.763