Reactive Gas Pressure Syntheses of Nitride‐Diazenides and Hydridometalates

Nitride‐diazenides and hydridometalates (exemplified by the chemical systems Sr (Ba)‐N₂ and Rb‐Pt‐H₂) are obtained by reactive gas pressure syntheses in autoclaves starting from the elements and binary precursors, respectively. The formation of the nitride‐diazenides can be described in terms of reversible redox‐intercalation processes and that of the hydridometalates as reversible solid‐gas redox reactions. Phase formation and stability regions of the intermediate compounds of the chemical systems under consideration are particularly controlled by the level of the applied gas pressure.