Potassium trioxochlorochromate

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Space-filling model of part of the crystal structure of KCrO3Cl
Space-filling model of part of the crystal structure of KCrO3Cl[1]

Potassium trioxo­chloro­chromate[1], Potassium chlorochromate[2], Peligot's salt, or Péligot's salt is a chemical substance named after Eugène-Melchior Péligot[3]. Its formula is KCrO3Cl[4]

Peligot's salt is the potassium salt of chlorochromic acid (chromic acid where chlorine has replaced one of the OH groups). Peligot's salt can be considered intermediate between chromic acid and chromyl chloride[3].

It is stable in air but in water it can become hydrolysed. When under high temperature, Peligot's salt parts with its chlorine and produces chromic oxide[3].

Potassium chlorochromate can be prepared from potassium dichromate, hydrochloric acid, and water. The substance may look like long orange-red crystals[3].

Peligot's salt can oxidise the substance benzyl alcohol, a reaction which can be catalysed by acid[5].

The structure of Peligot's salt has been redeterminated in 2002[1].

[edit] (18-Crown-6)potassium chloro­chromate

Space-filling model of the unit cell of (18-crown-6)potassium chloro­chromate
Space-filling model of the unit cell of (18-crown-6)potassium chloro­chromate

(18-Crown-6)potassium chloro­chromate (1,4,7,10,13,16-hexaoxacyclo­octadecane-k6O)potassium chloro­chromate) or CrClO3 is a crystal structure that contains a K+ cation[6].

[edit] References

  1. ^ a b c U. Kolitsch (2002). "Redetermination of potassium chlorochromate, KCrO3Cl". Acta. Cryst. E58 (11): i105-i107. doi:10.1107/S1600536802019396. 
  2. ^ Synonyms Of Chemicals
  3. ^ a b c d Untitled Document
  4. ^ Glossary
  5. ^ SpringerLink - Journal Article
  6. ^ http://journals.iucr.org/e/issues/2005/02/00/cv6410/cv6410bdy.html