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Chlorination of compounds with active hydrogen attached to nitrogenThe plate is carefully dried and then treated with an atmosphere of chlorine gas (HCl+KMnO4 ) for 10 minutes (e.g. in a covered cylinder). Excess adsorbed chlorine is removed with a stream of air (30 minutes).The plate is the sprayed with a mixture of equal parts 1% potassium iodide and 1% starch. Compounds with active hydrogen attached to nitrogen, e.g. primary and secondary amines or amides, form blue spots. |