Technetium(IV) sulfide
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| Name = Technetium(IV) sulfide
| ImageFile = Molybdenite-3D-balls.png
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| IUPACName =
| OtherNames = Technetium disulphide
| Section1 = {{Chembox Identifiers
| CASNo = 34312-50-0
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| DTXSID =
| StdInChI=1S/2S.Tc
| StdInChIKey = YNVKFYSGICQOCU-UHFFFAOYSA-N
| SMILES = [Tc].[S].[S]
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| Section2 = {{Chembox Properties
|Tc=1| S=2
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| Section4 = {{Chembox Structure
| CrystalStruct = trigonal
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| Section7 = {{Chembox Hazards
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| Section6 = {{Chembox Related
| OtherCompounds = Molybdenum disulfide
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Technetium disulphide is a binary inorganic chemical compound of technetium metal and sulfur with the chemical formula {{chem2|TcS2}}.{{cite web |title=WebElements Periodic Table » Technetium » technetium disulphide |url=https://www.webelements.com/compounds/technetium/technetium_disulphide.html |publisher=webelements.com |access-date=22 July 2024}}{{cite journal |last1=German |first1=Konstantin E. |last2=Shiryaev |first2=Andrey A. |last3=Safonov |first3=Alexey V. |last4=Obruchnikova |first4=Yana A. |last5=Ilin |first5=Viktor A. |last6=Tregubova |first6=Varvara E. |title=Technetium sulfide – formation kinetics, structure and particle speciation |journal=Radiochimica Acta |date=28 March 2015 |volume=103 |issue=3 |pages=199–203 |doi=10.1515/ract-2014-2369 |url=https://www.degruyter.com/document/doi/10.1515/ract-2014-2369/html?lang=en |access-date=22 July 2024 |language=en |issn=2193-3405|url-access=subscription }}{{cite journal |last1=Pearce |first1=Carolyn I. |last2=Icenhower |first2=Jonathan P. |last3=Asmussen |first3=R. Matthew |last4=Tratnyek |first4=Paul G. |last5=Rosso |first5=Kevin M. |last6=Lukens |first6=Wayne W. |last7=Qafoku |first7=Nikolla P. |title=Technetium Stabilization in Low-Solubility Sulfide Phases: A Review |journal=ACS Earth and Space Chemistry |date=21 June 2018 |volume=2 |issue=6 |pages=532–547 |doi=10.1021/acsearthspacechem.8b00015 |bibcode=2018ESC.....2..532P |url=https://pubs.acs.org/doi/10.1021/acsearthspacechem.8b00015 |access-date=22 July 2024 |language=en |issn=2472-3452}}{{cite book |last1=Suthersan |first1=Suthan S. |last2=Horst |first2=John |last3=Schnobrich |first3=Matthew |last4=Welty |first4=Nicklaus |last5=McDonough |first5=Jeff |title=Remediation Engineering: Design Concepts, Second Edition |date=25 November 2016 |publisher=CRC Press |isbn=978-1-4987-7336-2 |page=403 |url=https://books.google.com/books?id=cTENDgAAQBAJ&dq=Technetium+disulfide&pg=PA403 |access-date=22 July 2024 |language=en}}
Synthesis
The compound can be prepared from the higher oxide:{{cite web |title=Реакция взаимодействия оксида технеция(VII) и серы |url=https://chemiday.com/reaction/3-1-0-17221 |publisher=chemiday.com |access-date=22 July 2024 |language=ru}}{{cite book |last1=Macintyre |first1=Jane E. |title=Dictionary of Inorganic Compounds |date=23 July 1992 |publisher=CRC Press |isbn=978-0-412-30120-9 |page=37-94 |url=https://books.google.com/books?id=9eJvoNCSCRMC&dq=Technetium+disulfide&pg=PA3794 |access-date=22 July 2024 |language=en}}
::{{chem2|2Tc2O7 + 15S → 4TcS2 + 7SO2}}
Also, the compound can be prepared by the reaction between both elements in a sealed tube at 450 °C, by the reaction between such components as {{chem2|Tc2(O2CCH3)5}} and {{chem2|H2S}}-gas in a flowing system at 450 °C, and by the reaction between {{chem2|K2TcCl6}} and {{chem2|H2S}}-gas in sulfuric acid.{{cite journal |last1=Ferrier |first1=Maryline |last2=Kerlin |first2=William M. |last3=Poineau |first3=Frederic |last4=Sattelberger |first4=Alfred P. |last5=Czerwinski |first5=Kenneth R. |title=Recent developments in the synthetic chemistry of technetium disulfide |journal=Dalton Transactions |date=22 October 2013 |volume=42 |issue=44 |pages=15540–15543 |doi=10.1039/C3DT52079J |pmid=24056388 |url=https://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt52079j |access-date=22 July 2024 |language=en |issn=1477-9234|url-access=subscription }}
Physical properties
Technetium disulfide is isomorphous with rhenium disulfide and has an {{chem2|MoS2}}-type structure.{{cite book |title=Advances in Inorganic Chemistry and Radiochemistry |date=1968 |publisher=Academic Press |isbn=978-0-08-057860-6 |page=27 |url=https://books.google.com/books?id=-SnCsg5jM_kC&dq=Technetium+disulfide&pg=PA27 |access-date=22 July 2024 |language=en}}
Technetium disulphide is reduced to the metal if heated to 1000 °C in a hydrogen atmosphere.