Rhenium(VII) sulfide

Rhenium(VII) sulfide

Names
IUPAC name Rhenium(VII) sulfide
Identifiers
CAS Number	12038-67-4^Y
3D model (JSmol)	Interactive image
ChemSpider	21171359
ECHA InfoCard	100.031.698
EC Number	234-882-5
PubChem CID	159414
UNII	K72K37878A^Y
CompTox Dashboard (EPA)	DTXSID901022921
InChI InChI=1S/2Re.7S Key: CVHXCQNYOAKCMI-UHFFFAOYSA-N InChI=1/2Re.7S/rRe2S7/c3-1(4,5)9-2(6,7)8 Key: CVHXCQNYOAKCMI-NEHFBHEFAV
SMILES S=[Re](=S)(=S)S[Re](=S)(=S)=S
Properties
Chemical formula	Re2S7
Molar mass	596.869 g/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H315, H319, H331, H412
Precautionary statements	P261, P264, P270, P271, P273, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P311, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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] $${\displaystyle {\ce {2Re{}+7S->[{} \atop \Delta ]Re2S7}}}$$Alternatively, rhenium(VII) oxide reacts with hydrogen sulfide in 4N HCl to the same end:^[2] $${\displaystyle {\ce {Re2O7{}+7H2S->[{} \atop \Delta ]Re2S7{}+7H2O}}}$$

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:

${\displaystyle \mathrm {Re_{2}S_{7}\ {\xrightarrow {600^{o}C}}\ 2ReS_{2}+3S} }$

In air, the sulfide oxidizes to sulfur dioxide:

${\displaystyle \mathrm {2Re_{2}S_{7}+21O_{2}\ {\xrightarrow {\Delta }}\ 2Re_{2}O_{7}+14SO_{2}} }$

References

1. Schwarz, D. E.; Frenkel, A. I.; Nuzzo, R. G.; Rauchfuss, T. B.; Vairavamurthy, A. (2004). "Electrosynthesis of ReS
   ₄. XAS Analysis of ReS
   ₂, Re
   ₂S
   ₇, and ReS
   ₄". Chemistry of Materials. 16: 151–158. doi:10.1021/cm034467v.
2. 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.