Chromium(III) perchlorate

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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
Occupational safety and health (OHS/OSH):
Main hazards
 poisonous
GHS labelling:[2]
GHS05: CorrosiveGHS08: Health hazard
Danger
H271, H315, H319, H335
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).

Chromium(III) perchlorate is an inorganic compound, a salt with the chemical formula Cr(ClO4)3. It's hexahydrate Cr(ClO4)3·6H2O is a cyan solid that dissolves in water.

Preparation[edit]

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

Cr2O3 + 6HClO4 → 2Cr(ClO4)3 + 3H2O

Hydrates[edit]

Chromium perchlorate has many hydrates, such as the hexahydrate Cr(ClO4)3·6H2O[1] and a nonahydrate Cr(ClO4)3·9H2O.[3] All of them are cyan substances that are soluble in water.

Related compounds[edit]

  • Cr(ClO4)3 will react 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 also known. When x = 3, this compound is red, when x = 4 or 5, it is orange.[5] The hexammine complex will explode.[5]
  • Cr(ClO4)3 can also form complexes with N2H4, such as purple Cr(ClO4)3·2N2H4.[6]
  • Cr(ClO4)3 can also form complexes with urea (CO(NH2)2), such as Cr(ClO4)3·6CO(NH2)2 with a hexagonal structure.[7]

References[edit]

  1. ^ a b William M. Haynes, ed. (2016). CRC Handbook of Chemistry and Physics (97 ed.). CRC Press. pp. 4–57. ISBN 9781498754293.
  2. ^ Elements, American. "Chromium Perchlorate Hexahydrate". American Elements. Retrieved 11 December 2021.
  3. ^ Chromium Perchlorate
  4. ^ Handbook of inorganic substances 2017 – Google Sách.
  5. ^ a b Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3278. ISBN 978-0-412-30120-9.
  6. ^ chemistry-chemists.com https://web.archive.org/web/20200326015850/http://chemistry-chemists.com/chemister/Neorganika/inorganic-hydrazine-derivatives-2014.pdf. Archived from the original on 2020-03-26. {{cite web}}: Missing or empty |title= (help)
  7. ^ Barbieri, G. A. (17 September 1913). "Über Eisen-Harnstoffverbindungen" (PDF). Chemisches Zentralblatt (12): 1035.
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