Phosphide Hydrogen Solid

These workers also obtained hydrogen hemienneaphosphide, P9H2, by the action of heat on the diphosphide. L. Hackspill also reported the solid hydrogen hemi-pentaphosphide, P5H2) to be formed by heating the hemienneaphosphide in vacuo at 80°, or by the action of dil. acetic acid on the corresponding alkali phosphides. 

Chemical Reactions.—P12H6 is dissociated when heated above 70° C-. in an indifferent gas—into its elements at 175° C. in CO 1 or into phosphorus and phosphine at 215° C. The ignition temperature in air is 120° to 150° C.1 The only liquids which dissolve it without decomposition are phosphorus and PaH4. It dissolves in ammonia at -40° C. with evolution of phosphine. After evaporation of the ammonia a black solid is left which appears to be an ammine of a higher hydrogen phosphide. Like the other phosphides it is easily oxidised by halogens, chlorates and nitric acid.2... 

The hydrogen of this phosphide appears to have a slight acidic character, since the phosphide dissolves in alcoholic alkalies giving deep red solutions which contain polyphosphides, similar to those which are formed by the action of alcoholic alkali on finely divided scarlet phosphorus. These compounds are easily hydrolysed by dilution, or by the addition of acids, with the precipitation of a yellow or reddish mixture of solid hydrogen phosphide and scarlet phosphorus (which possibly contains a suboxide or P4H.OH8,4). 

Solid Hydrogen Phosphide —Preparation, Properties, Chemical Reactions. 

Hydrogen reacts with metal borides, carbides, silicides, nitrides, phosphides, oxides, sulfides, and halides to form a solid solution of hydrogen in the compound with... 

Hydrogen forms solid solutions with phosphides with no structural change. Whereas Pd P reacts readily with Hj at RT or below, Pd3P, j only dissolves hydrogen when it is nonstoichiometric i.e., solubility increases with increasing value of x. 

Solid hydrogen phosphide—P H 126 is a yellow solid, foi-meii when P.H, is decomposed by sunlight It is not phosphorescent and only ignites at 160 (320 F.). 

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