Silver dichromate

Silver dichromate is a chemical compound with the formula Ag2Cr2O7. It is insoluble in water and decomposes when treated with hot water. Its anion has a charge of -2.

Silver dichromate
Silver dichromate V1.svg
Names
IUPAC name
Silver dichromate
Identifiers
  • 7784-02-3
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.131 Edit this at Wikidata
EC Number
  • 232-044-3
  • InChI=1S/2Cr.2Ag.7O/q;;2*+1;;;;;;2*-1
  • InChI=1/2Cr.2Ag.7O/q;;2*+1;;;;;;2*-1/rCr2O7.2Ag/c3-1(4,5)9-2(6,7)8;;/q-2;2*+1
  • [Ag+].[Ag+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
Properties
Ag2Cr2O7
Molar mass 431.76 g/mol
Appearance ruby red powder
Density 4.77 g/cm3
Ksp = 2.0×10−7
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Silver-dichromate-3D-vdW.png

SynthesisEdit

K2Cr2O7 (aq) + 2 AgNO3 (aq) --> Ag2Cr2O7 (s) + 2 KNO3 (aq)

ApplicationsEdit

Related complexes are used as oxidants in organic chemistry.[1] For instance, tetrakis(pyridine)silver dichromate, [Ag2(py)4]2+[Cr2O7]2−, is used to convert benzylic and allylic alcohols to corresponding carbonyl compounds.[2]

ReferencesEdit

  1. ^ Firouzabadi, H.; Seddighi, M.; Ahmadi, Z. Arab; Sardarian, A. R. (1989). "Selective Oxidative Cleavage of Benzylic Carbon-Nitrogen Double Bonds Under Non-Aqueous Condition with Tetrakis(pyridine)-Silver Dichromate [(Py)2Ag]2Cr2O7". Synthetic Communications. 19 (19): 3385. doi:10.1080/00397918908052745.
  2. ^ Firouzabadi, H.; Sardarian, A.; Gharibi, H. (1984). "Tetrakis (Pyridine)silver Dichromate Py4Ag2Cr207 - A Mild and Efficient Reagent for the Conversion of Benzylic and Allylic Alcohols to Their Corresponding Carbonyl Compounds". Synthetic Communications. 14: 89–94. doi:10.1080/00397918408060869.