Transfer the Grignard reagent solution to a beaker. Fill a small glass sample vial with
crushed solid CO2
and add it slowly piece-wise to the Grignard reagent solution with rapid
stirring. Stir until all of the CO2
has reacted and then allow the mixture to warm to room
temperature. With stirring, add water (10 mL) followed by aq. 6 M HCl solution (3 mL)
drop-wise. Add diethyl ether (10 mL, wash-bottle ether is fine for this process) and
continue to stir until most of the solids have dissolved.
Transfer the two-phase mixture to a separatory funnel and shake vigorously to further
extract the product into the organic layer. Isolate the organic layer and extract the aqueous
layer again with diethyl ether (5 mL). Combine the organic layers and extract them with
aq. 5 % NaOH solution (2 x 10 mL portions).
Remove any solids in the basic extract by filtration. Acidify the extract to ~pH 3 by dropwise
addition of aq. 6M HCl solution. This process should require 3-5 mL of acid solution.
Isolate the product by vacuum filtration on a small plastic filter funnel and rinse it with 2
x 5 mL water. Allow the product to air-dry by pulling vacuum on it for ~15 min. Report
the mass and % yield of the product, and submit a sample for 1H-NMR analysis. Obtain
an IR spectrum of the dry product