Chromium(III) chloride

Chromium(III) chloride is an inorganic compound of chromium in the +3 oxidation state and chloride ions, with formula CrCl₃. It occurs as anhydrous and hydrated forms.

Connect

Chromium: Chromium is a chemical element with atomic number 24 and a transition metal. Chromium supplies the +3 metal center in CrCl₃.
Layered crystal: A layered crystal is a solid whose atoms or ions form repeated sheets held together by comparatively weaker interactions. Anhydrous chromium(III) chloride has a layered structure with chromium coordinated by chloride ions.
Chromium(III) complex: A chromium(III) complex is a coordination compound containing a chromium ion in the +3 oxidation state. Chromium(III) chloride supplies chromium for preparing many such complexes.
Chromium(II) chloride: Chromium(II) chloride is an inorganic compound with formula CrCl₂ and chromium in the +2 oxidation state. Its lower chromium oxidation state gives it different reactivity and reducing behavior.
Chromium(III) chloride tetrahydrate: Chromium(III) chloride tetrahydrate is a hydrated chromium(III) chloride with four water molecules per formula unit. It illustrates that chromium(III) chloride hydration is not limited to the hexahydrate.
Chloride: Chloride is the negatively charged ion Cl⁻, formed when a chlorine atom gains one electron. Three chloride ions balance chromium’s +3 charge in the compound’s formula.
Octahedral molecular geometry: Octahedral geometry places six ligands around a central atom at the vertices of an octahedron. Chromium centers in anhydrous CrCl₃ are surrounded by six chloride ligands.
Chromium plating: Chromium plating deposits a chromium coating onto a surface, usually by an electrochemical process. Chromium(III) chloride has been investigated as a chromium source in trivalent plating baths.
Chromium(VI) chloride: Chromium(VI) chloride is a formal chromium(VI) chloride species, distinct from the stable common chromium(III) salt. The oxidation-state label separates it from CrCl₃; simple CrCl₆ is not an ordinary stable salt.
Chromium(III) chloride monohydrate: Chromium(III) chloride monohydrate is a hydrated chromium(III) chloride containing one water molecule per formula unit. It is a lower-water hydrate within the compound’s family of hydrated forms.