Английская Википедия:Carbonyl bromide
Carbonyl bromide, also known as bromophosgene, is an organic chemical compound with the chemical formula Шаблон:Chem2. It is a colorless liquid. It is a bromine analogue of phosgene. It is a carbon oxohalide. Carbonyl bromide is a decomposition product of halon compounds used in fire extinguishers.[1]
Synthesis and reactions
Carbonyl bromide is formed by the oxidation carbon tetrabromide with sulfuric acid:
In contrast to phosgene, carbonyl bromide cannot be produced efficiently by halogenation of carbon monoxide. The bromination of carbon monoxide follows this equation:
But the process is slow at room temperature. Increasing temperature, in order to increase the reaction rate, results in a further shift of the chemical equilibrium towards the educts (since ΔRH < 0 and ΔRS < 0).[2][3]Шаблон:Cln
Carbonyl bromide slowly decomposes to carbon monoxide and elemental bromine even at low temperatures.[4] It is also sensitive to hydrolysis, breaking down into hydrogen bromide, water and carbon dioxide.
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