Part 1: 1. On treatment with an aqueous acid, which of the following carbonyl co

Question

Part 1: 1. On treatment with an aqueous acid, which of the following carbonyl compounds will be expected to have the greatest amount of hydrate at equilibrium? (4 points) 2. Identify ALL acetals that are NOT derived from an aldehyde. (6 points) (E) (F 3. Several of the following aryl bromides cannot be used to generate Grignard reagents. Identify ALL aryl bromides that ARE suitable for generating Grignard reagent by treatment with Mg in dry ether (6 points) 4. Identify the correct order of increasing pKa of the following carboxylic acids. (4 points) COOH (IV) (D) (IV) (I)s(Ill)s(11) Which of the following carbonyl compounds will have the highest enol content? (4 points)

Explanation / Answer

1. Option C, since For atoms forms strong H- bonds with water, hence more amount of hydrate.

2. Options B, D and F, since acetals derived from aldehyde have one hydrogen atom at carbonyl carbon atom while those derived from ketones don't have hydrogen atoms.

3. Options B,D, E and F. Since options A and C have acidic hydrogen, it will reacts with Grinard reagent insitu and forms concerned hydrocarbons.

4. Option B, since EWGs (NO2, Cl) increases the acidity while EDGs decrease the acidity.

5. Option D, since it gains aromaticity nd and gets more stable by the formation of enol.

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