Pentasulfur hexanitride

Structural formula
General
Surname	Pentasulfur hexanitride
Molecular formula	S 5 N 6
Brief description	orange crystals
External identifiers / databases
CAS number 68993-02-2 Wikidata Q29840935
properties
Molar mass	244.34 g mol −1
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Pentasulfur hexanitride is an inorganic chemical compound of sulfur from the group of covalent nitrides . The compound is one next to the disulfur dinitride , the Tetraschwefeldinitrid , the tetrasulfur tetranitride , the Monoschwefeldinitrid , the Monoschwefelmononitrid , the Oligoschwefeldinitriden and the polymeric polythiazyl (SN) _x to the group of sulfur-nitrogen compounds or Schwefelnitride .

Production is achieved by reacting tetrasulfur tetra nitrogen dichloride with bis (trimethylsilyl) sulfur diimide.

Another synthetic route is the reaction of bromine with tetrabutylammonium tetrasulfur pentanitride Bu ₄ N ⁺ S ₄ N ₅ ^- in methylene chloride .

The compound forms orange crystals that are prone to explosive decay. It is stable at room temperature under inert conditions . When air enters, it turns black immediately. Thermal decomposition begins above 130 ° C. In vacuum at 10 ^-2 mbar the compound at 45 ° C can be sublimated be.

The structure of the pentasulfur hexanitride can be derived from that of the tetrasulfur tetranitride S ₄ N ₄ by incorporating a sulfur diimide group into an SS bond. The molecular structure can be seen as basket-like with the S ₄ N _{4 part of the} molecule as the actual basket and the NSN group as the associated handle. The SN bond lengths are on average 161 pm in the S ₄ N ₄ moiety, 152.6 pm in the NSN moiety and 170.6 pm at the points of attachment. By incorporating a further sulfur diimide group into the second SS bond, a hexasulfur octanitride S ₆ N ₈ could be obtained, which has not yet been described in the literature.

Individual evidence

1. ↑ ^{a b c d e f g h i} Wiberg, E .; Wiberg, N .; Holleman, AF: Inorganische Chemie , 103rd edition, 2017 Walter de Gruyter GmbH & Co. KG, Berlin / Boston, ISBN 978-3-11-026932-1 , p. 682, (accessed via De Gruyter Online).
2. ↑ ^{a b c} Entry on sulfur-nitrogen compounds. In: Römpp Online . Georg Thieme Verlag, accessed on March 2, 2017.
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.