Silver(I) hyponitrite
| Names | |
|---|---|
| Other names
Silver hyponitrite
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| Identifiers | |
| Properties | |
| Ag2N2O2 | |
| Molar mass | 275.75 |
| Appearance | bright canary yellow solid |
| Density | 5.75 g/cm3 (at 30 °C) |
| slightly soluble | |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Silver(I) hyponitrite is an ionic compound with formula Ag
2N
2O
2 or (Ag+
)2[ON=NO]2-, containing monovalent silver cations and hyponitrite anions. It is a bright canary yellow solid practically insoluble in water and most organic solvents, including DMF and DMSO.
The compound was described in 1848.
The salt can be precipitated from a solution of sodium hyponitrite in water by the addition of silver nitrate:
Excess silver nitrate yields a brown or black precipitate.
Silver hyponitrite can be prepared also by reducing silver nitrate AgNO
3 with sodium amalgam.
Silver hyponitrite is sparingly soluble in concentrated alkali hyponitrite solutions, but quite soluble in aqueous ammonia due to the formation of the complex cation [(NH
3)3Ag]+. The compound is slowly decomposed by light.
The anhydrous compound decomposes in vacuum at 158 °C. The primary decompostition products are silver(I) oxide Ag
2O and nitrous oxide N
2O. However, these then react to form a variable mixture of nitrogen, metallic silver, and various oxides of the two elements and silver salts.
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