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Chromium(III) perchlorate

Chemical compound From Wikipedia, the free encyclopedia

Chromium(III) perchlorate is an inorganic compound, a salt with the chemical formula Cr(ClO4)3. It has many hydrates, including a hexahydrate Cr(ClO4)3·6H2O[1] and a nonahydrate Cr(ClO4)3·9H2O.[3] They water-soluble cyan solids.

Quick facts Names, Identifiers ...
Chromium(III) perchlorate
Names
Other names
  • Chromium(III) perchlorate
  • Chromium triperchlorate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 236-905-4
  • InChI=1S/3ClHO4.Cr/c3*2-1(3,4)5;/h3*(H,2,3,4,5);/q;;;+3/p-3
    Key: ZKJMJQVGBCLHFL-UHFFFAOYSA-K
  • hexahydrate: InChI=1S/3ClHO4.Cr.6H2O/c3*2-1(3,4)5;;;;;;;/h3*(H,2,3,4,5);;6*1H2/q;;;+3;;;;;;/p-3
    Key: AWECJTDFTJYSGZ-UHFFFAOYSA-K
  • [O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[Cr+3]
  • hexahydrate: O.O.O.O.O.O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[Cr+3]
Properties
Cr(ClO4)3
Molar mass 350.3489
Appearance cyan solid
anhydrous: 58 g/100 mL (25 °C)
hexahydrate: 130 g/100 mL (20 °C)[1]
Solubility soluble in ethanol
Hazards
GHS labelling:[2]
GHS03: OxidizingGHS07: Exclamation mark
Danger
H272, H302, H315, H317, H319
P210, P220, P261, P264, P264+P265, P270, P272, P280, P301+P317, P302+P352, P305+P351+P338, P321, P330, P333+P317, P337+P317, P362+P364, P370+P378, P501
Related compounds
Related compounds
 Chromium(III) chloride
Chromium chlorate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

Chromium perchlorate can be prepared by reacting chromium(III) oxide or chromium(III) hydroxide with perchloric acid:

Cr2O3 + 6HClO4 → 2Cr(ClO4)3 + 3H2O

Reactions

Chromium perchlorate reacts with NH3 in suitable conditions to form an orange hexammine complex Cr(ClO4)3·6NH3.[4] Other compounds with the general formula Cr(ClO4)3(NH3)x are known. When x = 3, the compound is red, when x = 4 or 5, it is orange.[5] The hexammine complex will explode.[5][vague]

It forms complexes with N2H4, such as purple Cr(ClO4)3·2N2H4.[6]

It can also form complexes with urea (CO(NH2)2), such as Cr(ClO4)3·6CO(NH2)2 with a hexagonal structure.[7]

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