Chlorid rheniový

chlorid rheniový
Obecné
Systematický názevChlorid rheniový
Anglický názevRhenium(VI) chloride
Německý názevRhenium(VI)-chlorid
Sumární vzorecReCl6
Vzhledčerná pevná látka
Identifikace
Registrační číslo CAS31234-26-1
PubChem5148054
SMILESCl[Re](Cl)(Cl)(Cl)(Cl)Cl
InChIInChI=1S/6ClH.Re/h6*1H;/q;;;;;;+6/p-6
Key: GSGIQJBJGSKCDZ-UHFFFAOYSA-H
Vlastnosti
Molární hmotnost398,91 g/mol
Teplota tání29 °C[1]
Struktura
Tvar molekulyoktaedr
Není-li uvedeno jinak, jsou použity
jednotky SI a STP (25 °C, 100 kPa).
Některá data mohou pocházet z datové položky.

Chlorid rheniový je anorganická sloučenina s chemickým vzorcem ReCl6.

Příprava

Chlorid rheniový byl poprvé připraven roku 1962 chlorací rhenia při teplotě 600 °C.[2] Lze jej také připravit reakcí fluoridu rheniového s nadbytkem chloridu boritého:

ReF6 + 2 BCl3 → ReCl6 + 2 BF3
2 ReF6 + 6 BCl3 → ReCl6 + 6 BF2Cl

Vlastnosti

Chlorid rheniový je černá paramagnetická pevná látka, která tvoří jehličkovité krystaly, které jsou hnědočervené, když jimi prochází světlo a tmavě zelené, když se od nich odráží světlo. Krystaly tají pár stupňů nad pokojovou teplotou za vzniku nahnědlé kapaliny, která se při zahřátí vypařuje za vzniku zelené páry.[2] Molekula ReCl6 je oktaedrická, stejně jako chlorid wolframový.[3]

Za pokojové teploty je chlorid rheniový nestabilní a rozpadá se za vzniku chloridu rheničného:

2 ReCl6 → [ReCl5]2 + Cl2

Reference

V tomto článku byly použity překlady textů z článků Rhenium(VI) chloride na anglické Wikipedii a Rhenium(VI)-chlorid na německé Wikipedii.

  1. ↑ CANTERFORD, J.H.; WAUGH, A.B. Preparation and characterization of rhenium hexachloride and rhenium pentabromide. Inorganic and Nuclear Chemistry Letters. 1971-04, roč. 7, čís. 4, s. 395–399. Dostupné online [cit. 2024-07-04]. DOI 10.1016/0020-1650(71)80171-X. (anglicky) 
  2. ↑ a b COLTON, R. Rhenium Hexachloride. Nature. 1962-04, roč. 194, čís. 4826, s. 374–375. Dostupné online [cit. 2024-07-04]. ISSN 0028-0836. DOI 10.1038/194374a0. (anglicky) 
  3. ↑ TAMADON, Farhad; SEPPELT, Konrad. The Elusive Halides VCl5 , MoCl6 , and ReCl6. Angewandte Chemie International Edition. 2013-01-07, roč. 52, čís. 2, s. 767–769. Dostupné online [cit. 2024-07-04]. ISSN 1433-7851. DOI 10.1002/anie.201207552. PMID 23172658. (anglicky) 
Chloridy s prvkem v oxidačním čísle VI.

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