Disulfur
Disulfur is the diatomic molecule with the formula S2. It is analogous to the dioxygen molecule but rarely occurs at room temperature. This violet gas is the dominant species in hot sulfur vapors. S2 is one of the minor components of the atmosphere of Io, which is predominantly composed of SO2. The instability of S2 is usually described in the context of the double bond rule.
| Names | |
|---|---|
| IUPAC name
Disulfur | |
| Systematic IUPAC name
Disulfene | |
| Other names
Diatomic sulfur Sulfur dimer | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| 753 | |
PubChem CID |
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CompTox Dashboard (EPA) |
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SMILES
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| Properties | |
| S2 | |
| Molar mass | 64.12 g·mol−1 |
| 0 D | |
| Thermochemistry | |
Heat capacity (C) |
32.51 kJ K−1 mol−1 |
Std molar entropy (S⦵298) |
228.17 J K−1 mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
128.60 kJ mol−1 |
| Related compounds | |
Related compounds |
Triplet oxygen |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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