Iron oxychloride

Iron oxychloride

Names
IUPAC name Iron oxychloride
Identifiers
CAS Number	56509-17-2 N
ChemSpider	4955733 N
EC Number	260-233-0
Jmol 3D model	Interactive image
PubChem	6453349
InChI InChI=1S/ClH.Fe.O/h1H;;/q;+1;/p-1 N Key: YPLPZEKZDGQOOQ-UHFFFAOYSA-M N
SMILES [O][Fe]Cl
Properties
Chemical formula	ClFeO
Molar mass	107.29 g·mol−1
Appearance	Vivid, dark violet, opaque crystals
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

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.

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

Fe₂O₃ + FeCl₃ → 3 FeOCl