Arsine oxides chemical reduction

Barium Arsenide, Ba3As2.—By passing arsine over barium oxide at red heat Soubeiran 4 obtained a mixture of arsenide and arsenite. Lebeau 6 prepared the pure arsenide by reduction of barium arsenate with carbon in an electric furnace. Barium arsenide is very similar in properties to the arsenides of calcium and strontium it is slightly darker in colour, more readily fusible and more reactive chemically. Its density at 15° C. is 4-1. It burns spontaneously in fluorine, chlorine or bromine vapour. In oxygen it burns at about 300° C. and in sulphur vapour at dull red heat. 

Elemental arsenic is a gray, crystalline material characterized by atomic number 33, atomic weight of 74.92, density of 5.727, melting point of 817°C, sublimation at 613°C, and chemical properties similar to those of phosphorus. Arsenic has four valence states —3, 0, -1-3, and -1-5. Arsines and methylarsines, which are characteristic of arsenic in the —3 oxidation state, are generally unstable in air. Elemental arsenic, As° is formed by the reduction of arsenic oxides. Arsenic trioxide (As+ ) is a product of smelting operations and is the material used in synthesizing most arsenicals. It is oxidized catalytically or by bacteria... 

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