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

using model chemistry: CCSD(T)=FULL/cc-pVDZ

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 CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-412.676038
Energy at 298.15K 
HF Energy-412.504202
Nuclear repulsion energy25.260891
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 CCSD(T)=FULL/cc-pVDZ
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 564 543        
2 Σu 645 621        
3 Πu 75i 73i        
3 Πu 75i 73i        

Unscaled Zero Point Vibrational Energy (zpe) 528.9 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 509.5 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 CCSD(T)=FULL/cc-pVDZ
B
0.27109

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVDZ

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 2.105
Li3 0.000 0.000 -2.105

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.10522.1052
Li22.10524.2103
Li32.10524.2103

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 CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-412.678593
Energy at 298.15K-412.678893
HF Energy-412.503575
Nuclear repulsion energy25.141024
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 CCSD(T)=FULL/cc-pVDZ
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 569 548        
2 A1 106 102        
3 B2 626 603        

Unscaled Zero Point Vibrational Energy (zpe) 650.3 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 626.4 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 CCSD(T)=FULL/cc-pVDZ
ABC
1.38670 0.36425 0.28848

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.305
Li2 0.000 1.816 -0.812
Li3 0.000 -1.816 -0.812

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.13182.1318
Li22.13183.6322
Li32.13183.6322

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 116.835
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability