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| Names | |
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| IUPAC name
Azacyclooctasulfane | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| S7NH | |
| Molar mass | 239.44 g·mol−1 |
| Appearance | Pale yellow solid |
| Density | 2.01 g/cm3 |
| Melting point | 113.5 °C (236.3 °F; 386.6 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Heptasulfur imide is the inorganic compound with the formula S7NH. It is a pale yellow solid that is, like elemental sulfur, highly soluble in carbon disulfide. The compound, which is only of academic interest, is representative of a family of sulfur imides (or azacyclosulfanes or thiacycloazanes) Sx(NH)y.
It is prepared by reaction of disulfur dichloride with ammonia,[1] although other methods have been developed.[2] Together with S7NH, the reaction also produces three isomers of S6(NH)2 (diazacyclooctasulfanes) and two isomers of S5(NH)3 (triazacyclooctasulfanes).[which?]
Azacyclooctasulfane is an analogue of octasulfur (cyclooctasulfane) S8, with one −S− replaced by −NH−. The S−NH−S center is almost planar,[3] suggesting that the amine is nonbasic.
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