Chemistry:Rhenium(VII) sulfide
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| IUPAC name
Rhenium(VII) sulfide
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| Properties | |
| Re2S7 | |
| Molar mass | 596.869 g/mol |
| Hazards | |
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| GHS Signal word | Danger |
| H301, H315, H319, H331, H412 | |
| P261, P264, P270, P271, P273, P280, P301+310, P302+352, P304+340, P305+351+338, P311, P321, P330, P332+313, P337+313, P362, P403+233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Tracking categories (test):
Rhenium(VII) sulfide is a chemical compound with the formula Re2S7. It has a complex structure, but can be synthesized from direct combination of the elements:[1] [math]\ce{ 2Re{} + 7S ->[{}\atop\Delta] Re2S7 }[/math]Alternatively, rhenium(VII) oxide reacts with hydrogen sulfide in 4N HCl to the same end:[2] [math]\ce{ Re2O7{} + 7H2S ->[{}\atop\Delta] Re2S7{} + 7H2O }[/math]
The compound catalyses the reduction of nitric oxide to nitrous oxide and hydrogenation of double bonds. In this regard, it unusually tolerates sulfur compounds, which poison noble metal catalysts.[1]
Rhenium(VII) sulfide decomposes when heated. In vacuum, it generates rhenium(IV) sulfide:
- [math]\displaystyle{ \mathrm{Re_2S_7 \ \xrightarrow{600^oC}\ 2ReS_2 + 3S } }[/math]
In air, the sulfur oxidizes to sulfur dioxide:
- [math]\displaystyle{ \mathrm{2Re_2S_7 + 21O_2 \ \xrightarrow{\Delta}\ 2Re_2O_7 + 14SO_2 } }[/math]
References
- ↑ 1.0 1.1 Schwarz, D. E.; Frenkel, A. I.; Nuzzo, R. G.; Rauchfuss, T. B.; Vairavamurthy, A. (2004). "Electrosynthesis of ReS4. XAS Analysis of ReS2, Re2S7, and ReS4". Chemistry of Materials 16: 151–158. doi:10.1021/cm034467v.
- ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- Kunyants, I. L. et al, eds. (1995). Химическая энциклопедия [Chemical encyclopedia] (in Russian). Moscow: Soviet Encyclopedias. ISBN:978-5-85270-092-6
- Nikolsky, B. P. et al, eds. (1971). Справочник химика [Handbook of Chemistry] (in Russian). 3rd (revised) ed. Leningrad: Khimiya Publishing.
- Ripan, R.; Ceteanu, I. (1972). Химия металлов [Chemistry of Metals] (in Russian). Неорганическая химия [Inorganic chemistry]. Moscow: Mir.
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