Alkali metal magnesiates complexes

Fig. 35 Schematic examples of (a) co-complexation and (b) insertion routes to mixed-ligand alkali-metal magnesiates. Note that possible aggregation of the starting organometallics is not taken into account in this simplifled depiction...

Magnesium amides can form a wide range of mixed metal amido complexes with alkali metal ions (M2[Mg(NH2)4]) (M = K, Rb or Cs).These contain tetrahedral Mg-centered [Mg(NH2)4] ions connected in three-dimensional networks by coordination of the amido groups to the group 1 metal ions. The most common hetero metal is lithium and lithium amido magnesiates are readily accessible by the addition of a lithium amide to a magnesium amide. 

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