Question

Q. 21. Convert the following: (1) chlorobenzene to phenol (ii) ethanal to ethanol (iii) iodomethane to methoxy methane
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Answer 1

Answer:

(1). chlorobenzene to phenol

To obtain sodium phenoxide ion, the reactant chlorobenzene is elevated with aqueous sodium hydroxide at temperatures of 623K and 300atm. Sodium phenoxide ion is then combined with Dilute HCl during the next step, that produces the final product as a phenol

Answer 2

A chemical reaction requires reactants and catalysts or physical factors to result in the production of products.

• Conversion of Chlorobenzene to Phenol: In this reaction, chlorobenzene in the presence of concentrated NaOH under 300°C with high pressure forms an intermediate compound called sodium phenoxide.

• This intermediate compound on hydrogenation will result in the formation of phenol.

• Conversion of Ethanal to  Ethanol: In this reaction, lithium aluminum hydride is the catalyst that converts aldehyde to alcohol.

• Conversion of Methoxy methane to Iodomethane: This is an example of the Sn2 mechanism in which methoxy methane with hydrogen iodide undergoes fast protonation to form dimethyl oxonium ion.

• This product by Sn2 mechanism will give iodomethane.