Reaction of alkali metals and hydrogen with gallium

Cs10H[Ga3H8]3: A Hydrogenous Zintl phase Containing Propane-Like Polyanions [Ga3H8]3– and Interstitial Hydrogen

“…The ternary metal hydride Cs 10 Ga 9 H 25 is obtained as a gray microcrystalline powder from reacting mixtures of cesium and gallium with proportions close to 1:1 in a hydrogen atmosphere at elevated temperatures. Initially it was expected that these reactions would yield either CsGaH 4 with separated [GaH 4 ] − entities, 20 or possibly CsGaH 2 containing polyanionic linear chains [GaH 2 ] n n− , analogous to RbGaH 2 . The IR spectrum of Cs 10 Ga 9 H 25 is shown in Figure 2 together with those of RbGaH 2 and Rb 8 Ga 5 H 15 .…”