Molecule
- Name
- Octasulfur
- IUPAC name
- Octasulfur
- Secondary names
- Octasulphur, Cyclo-octasulfur, Cyclo-octasulphur, Octasulfur, Octathiocane, sulfur molecule, sulphur molecule, Sulfur octamer, Cyclic octaatomic sulfur, S8
- InChI
- InChI=1S/S8/c1-2-4-6-8-7-5-3-1
- InChI key
- JLQNHALFVCURHW-UHFFFAOYSA-N
- CAS number
- 10544-50-0
- Comments
- natural S8
- Formula
- S8
- Chemical formula
- S8
- Structural formula
- [S1][S][S][S][S][S][S][S1]
- Charge
- 0
- Unpaired electrons
- 0
- Relations
-
- no
- Isotope mixture type
- terrestrial abundance
- Spin type
- unique
- Spin quantum numbers
- 0
- Molar mass
- 256.52 g/mol
- State STP
- solid
- Protic
- aprotic
- Polarity
- nonpolar
- Dipole
- 0.0 D
- Molecule symmetry
- D4d
- Case
- nonlinear-polyatomic
- Vibrations number
- 11
- Vibrations
-
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments V1 stretching sym. −S−S− A1 no 475.0 inactive active ia Raman: 475 cm−1 (solution, s) - with ν7 V2 bending −S−S−S− A1 no 218.0 inactive active ia Raman: 218 cm−1 (solution, s) V3 stretching asym. −S−S− B1 no 411.0 inactive inactive ia V4 bending in-p −S−S−S− B2 no 243.0 243.0 active inactive s in solution V5 stretching −S−S−S−S−S−S−S−S− ring E1 double 471.0 471.0 active inactive m in solution V6 deformation −S−S−S−S−S−S−S−S− ring E1 double 191.0 191.0 active inactive s in solution V7 stretching asym. −S−S− E2 double 475.0 inactive active ia Raman: 475 cm−1 (solution, s) - with ν1 V8 deformation −S−S−S− E2 double 152.0 inactive active Raman: 152 cm−1 (solution, s) V9 bending asym. out-p (twisting) −S−S−S−S−S−S−S−S− ring E2 double 56.0 inactive active Raman: 86 cm−1 (solution) - fundamental frequency from theory V10 stretching −S−S−S−S−S−S−S−S− ring E3 double 437.0 inactive active Raman: 437 cm−1 (solution, s) V11 deformation −S−S−S−S−S−S−S−S− ring E3 double 248.0 inactive active Raman: 437 cm−1 (solution, s) - Comments
- some modes to be confirmed! - Vibrations of the main isotope: 32S8. Data from Scott and McCullough (1964)
- Publications