3. (a) Why must anhydrous diethyl ether be used in this reaction? -Grignard reag
ID: 533841 • Letter: 3
Question
3. (a) Why must anhydrous diethyl ether be used in this reaction?
-Grignard reagents react immediately with any water present in the reaction mixture
-Magnesium reacts vigorously with any water present in the reaction mixture
-The reagents used in this reaction are only soluble in anhydrous diethyl ether
-The Grignard reagent reacts very slowly if there is any water present in the reaction mixture
(b) Extraction is a common separation technique that is used to help separate reaction products out of reaction mixtures which contain unreacted reagents and bi-products. During this experiment you will extract the reaction mixture with 5% aqueous sodium hydroxide.
What is the outcome of this step?
-Formation the sodium salt of benzoic acid
-Removal of magnesium salts
-Generation the Grignard reagent
-Protonation of benzoic acid
Explanation / Answer
3(a) grignard reagent readily react with water and form corresponding alkane (b) if NaOH is used then the remaining grignard reagent will remove