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Iron oxychloride

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Iron oxychloride
Names
IUPAC name Iron oxychloride
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.054.740 Edit this at Wikidata
EC Number
  • 260-233-0
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/ClH.Fe.O/h1H;;/q;+1;/p-1Key: YPLPZEKZDGQOOQ-UHFFFAOYSA-M
SMILES
  • O=Cl
Properties
Chemical formula ClFeO
Molar mass 107.29 g·mol
Appearance Vivid, dark violet, opaque crystals
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒verify (what is  ?) Infobox references
Chemical compound

Iron oxychloride is the inorganic compound with the formula FeOCl. This purple solid adopts a layered structure, akin to that of cadmium chloride. The material slowly hydrolyses in moist air. The solid intercalates electron donors such as tetrathiafulvalene and even pyridine to give mixed valence charge-transfer salts. Intercalation is accompanied by a marked increase in electrical conductivity and a color change to black.

Production

FeOCl is prepared by heating iron(III) oxide with ferric chloride at 370 °C (698 °F) over the course of several days:

Fe2O3 + FeCl3 → 3 FeOCl

Alternatively, FeOCl may be prepared by the thermal decomposition of FeCl3⋅6H2O at 220 °C (428 °F) over the course of one hour:

FeCl3 ⋅ 6H2O → FeOCl + 5 H2O + 2 HCl

References

  1. Lind, M. D. (1970-08-15). "Refinement of the crystal structure of iron oxychloride". Acta Crystallographica Section B. 26 (8): 1058–1062. doi:10.1107/s0567740870003618.
  2. ^ Kikkawa, S.; Kanamaru, F.; Koizumi, M.; Rich, Suzanne M.; Jacobson, Allan (1984-01-01). Holt, Smith L. Jr. (ed.). Layered Intercalation Compounds. John Wiley & Sons. pp. 86–89. doi:10.1002/9780470132531.ch17. ISBN 9780470132531.
  3. Chen, C.; Yu, T.; Yang, M.; Zhao, X.; Shen, X. (2019). "An All-Solid-State Rechargeable Chloride Ion Battery". Advanced Science. 6: 1802130. doi:10.1002/advs.201802130. PMC 6425448.
Iron compounds
Fe(−II)
Fe(0)
Fe(I)
Organoiron(I) compounds
  • (C5H5FeCO)2(CO)2
  • Fe(0,II)
    Fe(II)
    Organoiron(II) compounds
    Fe(0,III)
    Fe(II,III)
    Fe(III)
    Organoiron(III) compounds
    Fe(IV)
    Fe(VI)
    Purported
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