Mgamine2

Mgamine2, commonly written as Mg(NH2)2, is an inorganic compound known as magnesium amide (also called magnesium diamide). It is a white to off-white solid that is sensitive to air and moisture and reacts with water to release ammonia.

Structure and properties

In the solid state, magnesium amide forms a polymeric network in which magnesium centers are four-coordinate, typically adopting a tetrahedral geometry linked by bridging amide ligands (NH2−). The compound is nonvolatile and shows limited solubility in common solvents; it readily hydrolyzes upon contact with moisture in air, producing magnesium hydroxide and ammonia.

Synthesis

Magnesium amide can be prepared by reaction of magnesium hydride with ammonia under appropriate conditions, for example MgH2 + 2 NH3 → Mg(NH2)2 + 2 H2. It can also be accessed via salt- or hydride-derived routes that supply the amide ligand in a controlled manner.

Reactions and applications

A primary reaction is hydrolysis: Mg(NH2)2 + 2 H2O → Mg(OH)2 + 2 NH3. Beyond its basic chemistry, magnesium amide serves as a reagent and precursor in inorganic synthesis, enabling the preparation of other magnesium amide complexes and derivatives. It has been investigated in research contexts for potential hydrogen storage materials, particularly in the broader area of metal amide chemistry, though practical hydrogen storage applications remain exploratory. It is also used as a laboratory reagent for introducing amide ligands in coordination and organometallic chemistry.

Safety

Mg(NH2)2 is moisture- and air-sensitive and reacts with water to release ammonia, a toxic and irritating gas. It should be handled under inert atmosphere with appropriate protective equipment, using proper ventilation and storage away from moisture sources.

Note: The formula Mgamine2 corresponds to Mg(NH2)2, commonly referred to as magnesium amide.