BERYLLIUM BROMIDE

Using the periodic table if necessary, write formulas for the following compounds (a) hydrogen bromide, (b) magnesium chloride, (c) barium sulfide, (d) aluminum fluoride, (e) beryllium bromide, (/) barium selenide, and (g) sodium iodide. 

Beryllium bromide, 3 663 physical properties of, 4 328 Beryllium carbide, 3 661-662 4 648,... 

BERYLLIUM BOROHYDRIDE BERYLLIUM BROMIDE BERYLLIUM CHLORIDE BERYLLIUM FLUORIDE BERYLLIUM IODIDE BISMUTH... 

Beryllium bromide also absorbs gaseous ammonia and the iodide unites with dry ammonia. If dry gas be passed slowly over beryllium iodide in the cold, increase in bulk takes place, and a white powder of composition 2BeI2.8NII3 is left. By slightly warming and passing more ammonia gas over the compound a further quantity is absorbed and a white crystalline mass is formed. 

Beryllium bromide [7787-46 4], BeBi, and beryllium iodide [7787-53-3], Bel2, are prepared by the reaction of bromine or iodine vapors, respectively, with metallic beryllium at 500—700°C. They cannot be prepared by wet methods. Neither compound is of commercial importance and special uses are unknown. 

BeBr2 (c). Biltz and Messerknecht2 and Biltz, Klatte, and Rahlfs1 measured the heat of solution of solid beryllium bromide in aqueous hydrochloric acid. 

However, recently by using 7BeBr2, it was shown (69) that no isotopic exchange was found to occur between diphenylberyllium and beryllium bromide. Thus it appears that an equilibrium of the form of Eq. (56) is not established and the findings are represented best by the formulation given below ... 

Ashby, E. C., Sanders, R., and Carter, J., Redistribution of dimethylberyllium with beryllium bromide in diethylether, Chem. Comm., 997 (1967). 

The structures of beryllium bromide, BeBr2, and beryllium iodide, Bel2, are similar to that of BeCl2. The chlorides, bromides, and iodides of cadmium, CdX2, and mercury, HgX2, are also linear, covalent molecules (where X = Cl, Br, or I). 

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