Lithium arsenite

Lithium Arsenite.—A study of the ternary system Li20—As203-H20 at 25° C. reveals the existence of lithium metarsenite, LiAs02, which is soluble in water without decomposition.4... 

Geminal dihalides undergo partial or total reduction. The latter can be achieved by catalytic hydrogenation over platinum oxide [512], palladium [512] or Raney nickel [63, 512], Both partial and total reduction can be accomplished with lithium aluminum hydride [513], with sodium bis(2-meth-oxyethoxy)aluminum hydride [514], with tributylstannane [503, 514], electro-lytically [515], with sodium in alcohol [516] and with chromous sulfate [193, 197]. For partial reduction only, sodium arsenite [220] or sodium sulfite [254] are used. 

A solution of normal sodium arsenate in aqueous ammonia and methyl or ethyl alcohol yields with lithium salts a pale pink precipitate which is quantitative and may be dried, ignited and weighed. An arsenite does not precipitate lithium. A mixture of the two acids may thus be quantitatively separated, the arsenate first by lithium in the presence of aqueous ammonia and alcohol, and the arsenite in the filtrate by precipitation with magnesium chloride solution.7... 

H. Stamm also measured the solubilities of the salts of the alkalies in liquid ammonia —potassium hydroxide, nitrate, sulphate, chromate, oxalate, perchlorate, persulphate, chloride, bromide, iodide, carbonate, and chlorate rubidium chloride, bromide, and sulphate esesium chloride, iodide, carbonate, and sulphate lithium chloride and sulphate sodium phosphate, phosphite, hypophosphite, fluoride, chloride, iodide, bromate, perchlorate, periodate, hyponitrire, nitrite, nitrate, azide, dithionate, chromate, carbonate, oxalate, benzoate, phtnalate, isophthalate ammonium, chloride, chlorate, bromide, iodide, perchlorate, sulphate, sulphite, chromate, molybdate, nitrate, dithionate, thiosulphate, persulphate, thiocyanate, phosphate, phosphite, hypophosphite, arsenate, arsenite, amidosulphonate, ferrocyanide, carbonate, benzoate, methionate, phenylacetate, picrate, salicylate, phenylpropionate, benzoldisulphonate, benzolsulphonate, phthalate, trimesmate, mellitate, aliphatic dicarboxylates, tartrate, fumarate, and maleinate and phenol. 

Lithium meta-arsenite, LiAs02.—At 25c C. the ternary system lithium oxide—arscnious oxide— voter indicates the existence of a meta-arsenite soluble in water without decomposition.1... 

Figure 6.13 Speciation of arsenic anions. Allsep anion column, 100x4.5 mm. Mobile phase 4 mM lithium p-hydroxy-benzoate, pH 8.5. Conductivity detection. Peaks (1) arsenite, (2) arsenate (courtesy Alltech).

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