Silver dichromate

Silver dichromate

Names
IUPAC name Silver dichromate
Identifiers
CAS Number	7784-02-3
Jmol 3D model	Interactive image
InChI 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
SMILES [Ag+].[Ag+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
Properties
Chemical formula	Ag2Cr2O7
Molar mass	431.76 g/mol
Appearance	ruby red powder
Density	4.77 g/cm3
Solubility in water	Ksp = 2.0×10−7
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Silver dichromate is a chemical compound with the formula Ag₂Cr₂O₇. It is insoluble in water and decomposes when treated with hot water.

Synthesis

K₂Cr₂O₇ (aq) + 2 AgNO₃ (aq)→ Ag₂Cr₂O₇ (s) + 2 KNO₃ (aq)

Applications

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