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

using model chemistry: CCD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-412.733318
Energy at 298.15K 
HF Energy-412.522393
Nuclear repulsion energy25.536032
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/cc-pVTZ
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 594 554 0.00      
2 Σu 684 639 323.09      
3 Πu 16i 15i 126.25      
3 Πu 16i 15i 126.25      

Unscaled Zero Point Vibrational Energy (zpe) 623.2 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 581.9 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/cc-pVTZ
B
0.27698

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

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 2.083
Li3 0.000 0.000 -2.083

Atom - Atom Distances (Å)
  S1 Li2 Li3
S12.08262.0826
Li22.08264.1653
Li32.08264.1653

picture of dilithium sulfide state 1 conformation 1
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