How will you bring about the following ...

NCERT Class XII Chemistry
Chapter - Aldehydes, Ketones and Carboxylic Acids
Questions with Solutions

Question : 15 of 28

Marks: +1, -0

How will you bring about the following conversions in not more than two steps?

(i) Propanone to Propene

(ii) Benzoic acid to Benzaldehyde

(iii) Ethanol to 3-Hydroxybutanal

(iv) Benzene to m-Nitroacetophenone

(v) Benzaldehyde to Benzophenone

(vi) Bromobenzeneto 1-Phenylethanol

(vii) Benzaldehyde to 3-Phenylpropan-1-ol

(viii) Benzaldehyde to α-Hydroxyphenylacetic acid

(ix) Benzoic acid to m-Nitrobenzyl alcohol

Solution:

(i) Propanone to Propene :

{\mathrm{CH}_3-\underset{\mathrm{O}}{\underset{\parallel}{\mathrm{C}}}-\mathrm{CH}_3}_{\text{Propanone}} \xrightarrow{\mathrm{H}_2/\mathrm{Ni}} {\mathrm{CH}_3-\underset{\mathrm{OH}}{\underset{\vert}{\mathrm{C}}}\mathrm{H}-\mathrm{CH}_3}_{\text{2-Propanol}} \xrightarrow[443\,\text{K}]{\text{Conc. H}_2\mathrm{SO}_4} \underset{\text{Propane}}{\mathrm{CH}_3-\mathrm{CH}-\mathrm{CH}_2}

(ii) Benzoic acid to Benzaldehyde :

(iii) Ethanol to 3-Hydroxybutanal :

(iv) Benzene to m-Nitroacetophenone :

(v) Benzaldehyde to Benzophenone :

(vi) Bromobenzene to 1-Phenylethanol

(vii) Benzaldehyde to 3-Phenylpropan-1-ol :

(viii) Benzaldehyde to α-Hydroxyphenylacetic acid :

(ix) Benzoic acid to m-Nitrobenzyl alcohol :

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