Synonyms: elemental sulfur, orthorhombic sulfur, rhombic sulfur
|Superclasses:||an inorganic compound|
Elemental sulfur appears in a number of different allotropic modifications: rhombic, monoclinic, polymeric, and others. The rhombic structure is the most common. Both the rhombic and monoclinic forms of sulfur are made up of eight sulfur atoms arranged in a puckered-ring structure. At one atmosphere pressure and temperatures less than 95.4°C, rhombic is the stable crystalline form. Above 95.4 °C to the melt temperature of 118.9 °C, the monoclinic crystalline structure is dominant [Steudel00].
In addition, elemental sulfur always contains some polymeric sulfur consisting of chain-like macromolecules. The S-S bond energy is lower in polymeric sulfur than in ring sulfur [Franz07].
Monoisotopic Molecular Weight: 31.97207069 Daltons
Standard Gibbs Free Energy of Change Formation (ΔfG'° in kcal/mol): 8.770001 [Latendresse13]
Reactions known to consume the compound:
Reactions known to produce the compound:
In Reactions of unknown directionality:
Enzymes inhibited by S0, sorted by the type of inhibition, are:
Franz07: Franz B, Lichtenberg H, Hormes J, Modrow H, Dahl C, Prange A (2007). "Utilization of solid "elemental" sulfur by the phototrophic purple sulfur bacterium Allochromatium vinosum: a sulfur K-edge X-ray absorption spectroscopy study." Microbiology 153(Pt 4);1268-74. PMID: 17379736
Quentmeier04: Quentmeier A, Hellwig P, Bardischewsky F, Wichmann R, Friedrich CG (2004). "Sulfide dehydrogenase activity of the monomeric flavoprotein SoxF of Paracoccus pantotrophus." Biochemistry 43(46);14696-703. PMID: 15544340
©2014 SRI International, 333 Ravenswood Avenue, Menlo Park, CA 94025-3493