Aqueous sodium bicabonate used to wash the crude n-butyl bromide.
a) What was the purpose of this wash? Give equation.
b)Why would it be undesirable to waash the crude halide with aqueous sodium hydroxide?
alkene will form
the purpose of using bicarbonate was to nutralize the acid.
if we used sodium hydroxide we would not form t-pently chloride. we will be competing sn1 and e1 forming an alkene
pito
a) The purpose of washing crude n-butyl bromide with aqueous sodium bicarbonate is to remove any acidic impurities. Sodium bicarbonate (NaHCO3) is a weak base and is used to neutralize any residual acid present in the crude n-butyl bromide. The reaction can be represented by the following equation:
n-BuBr + NaHCO3 → n-BuOH + NaBr + CO2
In this reaction, n-BuBr (n-butyl bromide) reacts with NaHCO3 (sodium bicarbonate) to form n-BuOH (n-butanol), NaBr (sodium bromide), and CO2 (carbon dioxide). The carbon dioxide gas produced during the reaction usually results in effervescence or bubbling.
b) It would be undesirable to wash the crude halide with aqueous sodium hydroxide (NaOH) because sodium hydroxide is a strong base. Strong bases can react with the alkyl halide, such as n-butyl bromide, to form an alkaline hydrolysis product. The reaction can be represented by the equation:
n-BuBr + NaOH → n-BuOH + NaBr
In this reaction, n-BuBr reacts with NaOH to form n-BuOH and NaBr, similar to the reaction with sodium bicarbonate. However, when a strong base like NaOH is used, there is a higher likelihood of the alkyl halide being hydrolyzed, resulting in a significant decrease in the yield of the desired product. Therefore, washing the crude halide with aqueous sodium hydroxide can lead to undesired side reactions and lower overall product yield.