all detail 21 EO 20. Which of the following reactions involves an egolate anio i

Question

all detail

   21

EO 20. Which of the following reactions involves an egolate anio intermediater (A) Alkylation of an enamine with methyl iodide (B) Self-condensation of acetaldchyde catalyzed by sodium hydroxide (C) Solvolysis of I-butyl chloride in aqueous acetoy- (D) Nucleophuilic displacement of iodide from 2,4,d-trinitroiodobenzene by ethoxide ion E) Nitration of toluene 21. A laboratory preparation of involves A) the oxidation of propionic acid (B) the action of sodium on propyl bromide- (C) the action of water on a-propyl magnesium bromaide- (D) treating 6propyl alcoholwith zinc and hydrochlodic acid (E) heating calcium propionate

Explanation / Answer

20.

option B is the answer.

self condensation of acetaldehyde catalyzes by NaOH.

this is aldol type condensation reaction.

CH3CHO + OH- .....> -CH2CHO <.....> H2C=CH-O- (enolate anion).

21.

option C is the answer.

CH3-CH2-CH2-MgBr + H2O ......> CH3CH2CH3 (propane) + Mg(OH)Br.

CH3-CH2-CH2-MgBr is strong base and deprotonate from H2O to form alkane (propane).

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