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All results from a given calculation for SiS2 (Silicon disulfide)

using model chemistry: LSDA/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at LSDA/3-21G*
 hartrees
Energy at 0K-1077.818064
Energy at 298.15K-1077.817773
HF Energy-1077.818064
Nuclear repulsion energy158.623414
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 LSDA/3-21G*
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 526 516 0.00      
2 Σu 946 929 118.87      
3 Πu 173 170 6.84      
3 Πu 173 170 6.84      

Unscaled Zero Point Vibrational Energy (zpe) 909.0 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 892.6 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 LSDA/3-21G*
B
0.07140

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.000
S2 0.000 0.000 1.922
S3 0.000 0.000 -1.922

Atom - Atom Distances (Å)
  Si1 S2 S3
Si11.92161.9216
S21.92163.8431
S31.92163.8431

picture of Silicon disulfide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S2 Si1 S3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.578      
2 S -0.289      
3 S -0.289      


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 -38.198 0.000 0.000
y 0.000 -38.198 0.000
z 0.000 0.000 -41.921
Traceless
 xyz
x 1.862 0.000 0.000
y 0.000 1.862 0.000
z 0.000 0.000 -3.723
Polar
3z2-r2-7.447
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 4.255 0.000 0.000
y 0.000 4.255 0.000
z 0.000 0.000 14.727


<r2> (average value of r2) Å2
<r2> 142.791
(<r2>)1/2 11.950