Rhenium(VII) sulfide

Rhenium(VII) sulfide
Names
	IUPAC name Rhenium(VII) sulfide
Identifiers
CAS Number	12038-67-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	21171359;
ECHA InfoCard	100.031.698
EC Number	234-882-5;
PubChem CID	159414;
UNII	K72K37878A ;
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] ${\ce {2Re{}+7S->[{} \atop \Delta ]Re2S7}}$ Alternatively, rhenium(VII) oxide reacts with hydrogen sulfide in 4N HCl to the same end:^[2] ${\ce {Re2O7{}+7H2S->[{} \atop \Delta ]Re2S7{}+7H2O}}$

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:

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

In air, the sulfide oxidizes to sulfur dioxide:

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

References

^ ^a ^b 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.
^ 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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[:0-1] 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.

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