Once the Grignard reagent is prepared, it can be used to prepare the target compound. In this experiment the target compound is a carboxylic acid. To prepare a carboxylic acid, the Grignard reagent is carboxylated in a reaction with dry ice. After the reaction is complete, hot water is added to evaporate any remaining solvent. Acid is added to dissolve the magnesium salts and liberate the carboxylic acid. Once the solution is cooled, the acid can be collected. In this experiment, we will prepare a carboxylic acid (benzoic acid) by the Grignard method.
1 x 5g Magnesium Metal Turnings
2 x 25mL Tetrahydrofuran
1 x 20mL Bromobenzene
1 x 25mL Hydrochloric Acid, 36%
1 x 10g Decolorizing Carbon
Small quantity exemption 173.4
THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only