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All results from a given calculation for S8 (Octasulfur)

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-79.658152
Energy at 298.15K-79.658014
HF Energy-79.198172
Nuclear repulsion energy154.377063
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/CEP-121G
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 380 371 0.00      
2 A1 164 160 0.00      
3 B1 360 352 0.00      
4 B2 193 188 3.36      
5 E1 379 370 0.36      
5 E1 379 370 0.36      
6 E1 150 146 1.09      
6 E1 150 146 1.09      
7 E2 394 384 0.00      
7 E2 394 384 0.00      
8 E2 119 116 0.00      
8 E2 119 116 0.00      
9 E2 57 55 0.00      
9 E2 57 55 0.00      
10 E3 377 368 0.00      
10 E3 377 368 0.00      
11 E3 191 186 0.00      
11 E3 191 186 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 2213.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 2160.4 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/CEP-121G
ABC
0.01799 0.01799 0.00982

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is D4d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 2.591 0.555
S2 2.591 0.000 0.555
S3 0.000 -2.591 0.555
S4 -2.591 0.000 0.555
S5 -1.832 1.832 -0.555
S6 -1.832 -1.832 -0.555
S7 1.832 -1.832 -0.555
S8 1.832 1.832 -0.555

Atom - Atom Distances (Å)
  S1 S2 S3 S4 S5 S6 S7 S8
S13.66405.18163.66402.27254.91424.91422.2725
S23.66403.66405.18164.91424.91422.27252.2725
S35.18163.66403.66404.91422.27252.27254.9142
S43.66405.18163.66402.27252.27254.91424.9142
S52.27254.91424.91422.27253.66405.18163.6640
S64.91424.91422.27252.27253.66403.66405.1816
S74.91422.27252.27254.91425.18163.66403.6640
S82.27252.27254.91424.91423.66405.18163.6640

picture of Octasulfur state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S5 S4 107.441 S1 S8 S2 107.441
S2 S7 S3 107.441 S3 S6 S4 107.441
S5 S1 S8 107.441 S5 S4 S6 107.441
S6 S3 S7 107.441 S7 S2 S8 107.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability