return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: G3

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 G3
 hartrees
Energy at 0K-1085.502120
Energy at 298.15K-1085.497283
HF Energy-1083.977304
Nuclear repulsion energy159.681690
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 HF/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 551 519 0.00      
2 Σu 957 901 294.98      
3 Πu 184 173 20.51      
3 Πu 184 173 20.51      

Unscaled Zero Point Vibrational Energy (zpe) 937.6 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 883.4 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 MP2=FULL/6-31G*
B
0.07088

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

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 1.929
S3 0.000 0.000 -1.929

Atom - Atom Distances (Å)
  Si1 S2 S3
Si11.92861.9286
S21.92863.8572
S31.92863.8572

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