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• Chemical Properties

  Silver Oxide (Ag2O) is a heavy, brownish black powder, easily reduced by exposure to light. odorless; metallic taste. Soluble in ammonium hydroxide, potassium cyanide solu- tion, nitric acid, and sodium thiosulfate solution; slightly soluble in water; insoluble in alcohol.
  
  Silver Oxide has been known for several centuries, and it is still widely used in synthetic chemistry, including in novel strategies. It has many applications: it can act as a base – due to the presence of oxide –, as an oxidant – due to its easy reduction to metallic silver –, as an halogen scavenger – due to the precipitation of silver halides –, or as a source of silver ion, particularly useful for organometallics preparation.;

• Uses

  Silver oxide is used for polishing and coloring glass yellow. Also, it is used in purifying drinking water; as a catalyst; and as a germicide and parasiticide.
  Silver oxide has been used as a base and halide abstracting agent in the synthesis of areneruthenium metallacyclic complexes of dianionic chelating ligands.
  Silver oxide is a potentially valuable regenerative CO2 sorbent for space applications because it is a nontoxic solid that reacts with atmospheric CO2 at room temperature to form nontoxic solid silver carbonate. ;

• Preparation

  Silver Oxide is prepared by the reaction of aqueous silver nitrate and hydroxide salts.
  Ag2O is poorly soluble in all common solvents including water. It is however readily soluble in ammonia, leading the Tollens'reagent which possesses a historical importance in the development of organic chemistry. This also illustrates the fact that (as for other metal-based reagents), properties of Ag2O may depend on the formation of complexes in the reaction medium.
  Other commercially important silver chemicals include silver oxide which is used in batteries and silver cyanide which is used in electroplating. ;

• Reactions

  Mediates monoprotection of symmetrical diols with alkyl halides in good to excellent yield.
  Silver(I) oxide may be used to mediate the following processes:
  Selective monoalkylation of symmetric diols in the presence of alkyl halide.
  Palladium catalyzed cross-coupling of aryl- and alkenylsilanols with organic halides.
  Palladium-catalyzed reaction of aryl and alkenyl halides with terminal alkynes to form arylated or alkenylated alkynes, respectively. ;

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