Carbonyl bromide
Introduction '''Carbonyl bromide''', also known as '''bromophosgene''', is an organic chemical compound with the chemical formula . 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.
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 RS < 0).Carbonyl bromide slowly decomposes to carbon monoxide and elemental bromine even at low temperatures. It is also sensitive to hydrolysis, breaking down into hydrogen bromide, water and carbon dioxide.
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