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NCERT Class XII Chemistry
Chapter - Alcohols, Phenols and Ethers
Questions with Solutions

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Question : 37 of 45
Marks: +1, -0
Show how are the following alcohols prepared by the reaction of a suitable Grignard reagent on methanal.
Solution:  
(i) CH3−C∣CH3H−MgBr+HCHO→CH3−C∣CH3H−H2∣COMgBr→H2OCH3−C∣CH3H−CH2OH+Mg(OH)Br\text{(i)}\, \mathrm{CH}_3 - \overset{\mathrm{H}}{\underset{\mathrm{CH}_3}{\underset{\vert}{\mathrm{C}}}} - \mathrm{MgBr} + \mathrm{HCHO} \rightarrow \mathrm{CH}_3 - \overset{\mathrm{H}}{\underset{\mathrm{CH}_3}{\underset{\vert}{\mathrm{C}}}} - \overset{\overset{\mathrm{OMgBr}}{\mathrm{C}}}{\overset{\vert}{\mathrm{H}_2}} \xrightarrow{\mathrm{H}_2\mathrm{O}} \mathrm{CH}_3 - \overset{\mathrm{H}}{\underset{\mathrm{CH}_3}{\underset{\vert}{\mathrm{C}}}} - \mathrm{CH}_2\mathrm{OH} + \mathrm{Mg(OH)Br}
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