Gallium complexes imido

So far, much of the discussion has focussed on the bonding of phosphinidene units to aluminum, gallium, or indium. However, we are also interested in the coordination of phosphinidenes to transition metals - particularly in cases where the phosphinidene unit coordinates in a terminal fashion. As indicated below, terminal phosphinidene complexes, like imido complexes, can exist in angular or linear forms. 

When gallium is dissolved in a solution of KOH in liquid NH3, a salt K[I] is formed which is an amido complex of Ga(III). Heating one equivalent of K[I] at 570 K under vacuum liberates two equivalents of NH3, and produces a Ga(III) imido complex K[II]. Partial neutralization of K[I] with NH4CI yields Ga(NH2)3. Suggest identities for the salts K[I] and K[II], and write equations for the thermal decomposition and partial neutralization reactions of K[I]. Hint an imido complex formally contains. ... 

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