Talk:Carbonyl bromide: Difference between revisions

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Application

Can carbonyl bromide be used as a substitute for phosgene in chemical synthesis, due to its lower volatility? Or does the contamination by elemental bromine (which is produced by slow decomposition) interfere with these applications? The storage of carbonyl bromide should not be a great problem, despite its instability, storage could be fulfilled by keeping it cool and dark and in a gas proof container in order to keep the chemical equilibrium of its decomposition on the left side. --79.243.250.55 (talk) 11:41, 3 August 2013 (UTC)[reply]

"endergonic" compound?

The given value of the enthalpy of formation for carbonyl bromide is (seen as absolute values) lower than that of carbon monoxide. Is this possible? It would imply that the reaction CO + Br₂ -> COBr₂ is endothermic, and furthermore, that carbonyl bromide is thermodynamically unstable, because the reaction's entropy of the reaction above is clearly negative (two particles convert to one), unable to make a ΔG < 0 possible at any temperature if ΔH > 0. Thus, carbonyl bromide had to be very unstable, according to the given values... --79.243.242.143 (talk) 21:15, 6 September 2013 (UTC)[reply]

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 Can carbonyl bromide be used as a substitute for phosgene in chemical synthesis, due to its lower volatility? Or does the contamination by elemental bromine (which is produced by slow decomposition) interfere with these applications? The storage of carbonyl bromide should not be a great problem, despite its instability, storage could be fulfilled by keeping it cool and dark and in a gas proof container in order to keep the chemical equilibrium of its decomposition on the left side. --[[Special:Contributions/79.243.250.55|79.243.250.55]] ([[User talk:79.243.250.55|talk]]) 11:41, 3 August 2013 (UTC)
+== "endergonic" compound? ==
+The given value of the enthalpy of formation for carbonyl bromide is (seen as absolute values) lower than that of carbon monoxide. Is this possible? It would imply that the reaction CO + Br<sub>2</sub> -> COBr<sub>2</sub> is endothermic, and furthermore, that carbonyl bromide is thermodynamically unstable, because the reaction's entropy of the reaction above is clearly negative (two particles convert to one), unable to make a ΔG < 0 possible at any temperature if ΔH > 0. Thus, carbonyl bromide had to be very unstable, according to the given values... --[[Special:Contributions/79.243.242.143|79.243.242.143]] ([[User talk:79.243.242.143|talk]]) 21:15, 6 September 2013 (UTC)