Thallic bromide

Triammino-thallic Bromide, [Tl(NIT3)3]Br3, is prepared in the same way. It becomes very quickly yellow in colour, due to partial decomposition. Water transforms it into the oxide, T1203, and on heating to 100° C. it loses ammonia and bromine, leaving a residue of thallous bromide. 

Thallium-alaun, m. thallium alum, -bromiir, n. thallous bromide, thallium(I) bromide, -chlorid, n. thallium chloride, specif, thallic... 

In the oxidation of bromide by thallic ions a double electron transfer from the central atom to two separate ligands was postulated 27)... 

Mercury ethyl benzyl is prepared from ethyl magnesium bromide and benzyimercuric chloride. It is an oil, decomposing on long keeping into mercury diethyl and mercury dibenzyl. When treated with thallic chloride it yields thallous chloride, ethylmercuric chloride, benzyl-mercuric chloride, and benzaldehyde. ... 

Thallium dimethyl bromide may be obtained by the interaction of magnesium methyl bromide and thallic chloride, and crystallises from dilute ammonia containing sodium bromide in white, silver, glistening plates, wdiich do not melt at 275° C. When treated with silver fluoride it yields thallium dimethyl fluoride, which decomposes above C. It forms a hydrate containing 12 mols. 

Thallium dimethyl iodide.—This compound is obtained by treating the mother-liquors from the above bromide with potassium iodide, the decomposition temperature of the product being given as 264° to 266° C. It may also be prepared by the action of magnesium methyl iodide on thallic chloride. Obtained in this manner it only shows... 

Thallium diethyl bromide is easily isolated from magnesium ethyl bromide and thallic chloride its solubility falls between that of the chloride and iodide, and it remains unmelted at 300° C. 

Thallium dipropyl chloride is obtained by the action of magnesium n-propyl chloride on thallic chloride, the yield being 70 to 80 per cent, of the theory. The compound crystallises from dilute aqueous ammonia in glistening silver plates which decompose at 198° to 202° C. The bromide and iodide M.pt. 188° to 185° C.) are isolated in the usual manner, and the hydk dphide is more easily obtained than in the methyl and ethyl series. 

Thallium diphenyl bromide. —10-3 grams of thallic chloride in... 

Lead diethyl dichloride may be prepared as above or from lead diethyl diphenyl by the action of hydrochloric acid or by thallic chloride. It crystallises from alcohol in pale yellow needles. The corresponding dihromide is prepared from lead diethyl diphenyl by the action of dry hydrogen bromide. It crystallises in glistening, yellow prisms, which become white on long standing in air, and are decomposed by hot solvents. 

Lead diphenyl di-a-naphthyl, Pb(C6ll5)2(CioH7)2. This is obtained as a snow-white, granular, crystalline powder by the interaction of lead diphenyl dibromide and magnesium a-naphth d bromide. The product melts at 197° C., lead separating at a higher temperature, and it is soluble in ether, benzene, or hot alcohol. It reacts with thallic chloride according to the equation ... 

The bromide and iodide are similar to the chloride but still less stable. The iodide behaves as though it were a mixture of thallic iodide Tils and thallous periodide Til I2 analogous to KI I2. It has been suggested that it is a tautomeric compound,1 sometimes thallous and at other times thallic in behavior. It readily forms double salts. 

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