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 S8 (Octasulfur)

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D4D 1A1
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-3181.746947
Energy at 298.15K-3181.748147
HF Energy-3180.365412
Nuclear repulsion energy1218.548715
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 MP2/Def2TZVPP
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 499 475 0.00      
2 A1 220 210 0.00      
3 B1 451 429 0.00      
4 B2 248 236 3.54      
5 E1 494 470 1.32      
5 E1 494 470 1.32      
6 E1 195 185 3.50      
6 E1 195 185 3.50      
7 E2 496 472 0.00      
7 E2 496 472 0.00      
8 E2 151 144 0.00      
8 E2 151 144 0.00      
9 E2 68 65 0.00      
9 E2 68 65 0.00      
10 E3 466 443 0.00      
10 E3 466 443 0.00      
11 E3 253 240 0.00      
11 E3 253 240 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 2831.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 2694.4 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/Def2TZVPP
ABC
0.02215 0.02215 0.01208

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is D4d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 2.331 0.417
S2 2.331 0.000 0.417
S3 0.000 -2.331 0.417
S4 -2.331 0.000 0.417
S5 -1.648 1.648 -0.417
S6 -1.648 -1.648 -0.417
S7 1.648 -1.648 -0.417
S8 1.648 1.648 -0.417

Atom - Atom Distances (Å)
  S1 S2 S3 S4 S5 S6 S7 S8
S13.29614.66133.29611.96904.38654.38651.9690
S23.29613.29614.66134.38654.38651.96901.9690
S34.66133.29613.29614.38651.96901.96904.3865
S43.29614.66133.29611.96901.96904.38654.3865
S51.96904.38654.38651.96903.29614.66133.2961
S64.38654.38651.96901.96903.29613.29614.6613
S74.38651.96901.96904.38654.66133.29613.2961
S81.96901.96904.38654.38653.29614.66133.2961

picture of Octasulfur state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S5 S4 113.645 S1 S8 S2 113.645
S2 S7 S3 113.645 S3 S6 S4 113.645
S5 S1 S8 113.645 S5 S4 S6 113.645
S6 S3 S7 113.645 S7 S2 S8 113.645
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability