Surf Wiki
Save to docs
general/sulfides

From Surf Wiki (app.surf) — the open knowledge base

Titanocene pentasulfide

Titanocene pentasulfide

| NFPA-H = | NFPA-F = | NFPA-R = Titanocene dichloride}}

Titanocene pentasulfide is the organotitanium compound with the formula (C5H5)2TiS5, commonly abbreviated as Cp2TiS5. This metallocene exists as a bright red solid that is soluble in organic solvents. It is of academic interest as a precursor to unusual allotropes of elemental sulfur as well as some related inorganic rings.

Preparation and structure

Titanocene pentasulfide is prepared by treating Cp2TiCl2 with polysulfide salts: It was first produced by the addition of elemental sulfur to titanocene dicarbonyl: :(C5H5)2Ti(CO)2 + S8 → (C5H5)2TiS5 + 2 CO

The complex is viewed as a pseudotetrahedral complex of Ti(IV). The Ti–S distances are 2.420 and 2.446 Å and the S–S bond distances are of a normal range, 2.051–2.059 Å. The molecule exhibits a dynamic NMR spectrum owing to the chair–chair equilibrium of the TiS5 ring which equivalizes the Cp signals at high temperatures.

Reactions

Cp2TiS5 reacts with sulfur and selenium chlorides, ExCl2, to afford titanocene dichloride and various S5+x and S5Sex rings. Illustrative is the synthesis of S7 from disulfur dichloride: :(C5H5)2TiS5 + S2Cl2 → (C5H5)2TiCl2 + S7

It also reacts with alkenes and ketenes to give heterocycles composed of Ti, C and S. With trialkylphosphines, the cycle dimerize into rings of various sizes, depending on the trialkylphosphine used.{{cite book

Selected reactions of titanocene pentasulfide

References

References

  1. (1990). "Inorganic Syntheses".
  2. (1966). "π-Complexes of Group IVA metals with cyclopentadiene, indene, and fluorine". [[Bulletin de la Société Chimique de France.
  3. (1970). "Pentachalcogenide dianions in transition-metal complexes: crystal structure of bis-(π-cyclopentadienyl)titanium pentasulphide". [[Journal of the Chemical Society.
  4. (1984). "Preparation and Variable-Temperature NMR Studies of the Metallacyclosulfanes Cp2MS5 and (MeSCp)MS3, Where M = Ti, Zr, and Hf". Organometallics.
  5. (2003). "Solid Sulfur Allotropes Sulfur Allotropes". Topics in Current Chemistry.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

sulfides titanocenes titanium(iv)-compounds
Want to explore this topic further?

Ask Mako anything about Titanocene pentasulfide — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report