Aniline is the starting material from which p-nitroaniline was prepared by nitra

Question

Aniline is the starting material from which p-nitroaniline was prepared by nitration. Why you did not nitrate aniline directly? 2. Dibenzalacetone was prepared from acetone and benzeldehyde in water-ethanol solvent and NaOH. Why is NaOH required? 3. An amine was treated with benzenesulfonyl chloride and KOH. Two layers were observed. On acidification there were still two layers. The amine was not soluble in water. Was the amine primary, secondary, or tertiary? 4. What is the point of doing a TLC procedure?

Explanation / Answer

Answers:

Question #1: The aniline can not be nitrated directly, so in practice it is necessary first to Protective the amino group, then the nitration reaction will take place and finally the group will be removed protector, which will obtain the desired product.

Question #2: NaOH is the basic medium is required for carrying out the aldol condensation between acetone and benzaldehyde. NaOH acts on the carbonyl group of benzaldehyde.

Question #3: Hingsberg reactive is a reagent containing an aqueous solution of sodium hydroxide benzenesulfonyl chloride and is added to a substrate.

Thus, the reaction can distinguish between three types of amine.

Question #4: The thin layer chromatography is a fast and simple analytical technique, widely used in organic chemistry laboratory.

Among other things it allows:

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