wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Describe methods for the preparation of hydrocarbon by the reduction of aldehyde.

Open in App
Solution

The carbonyl group of aldehydes ( and ketones) is reduced to methylene group by following methods.
1) Clemmensen reduction:
Aldehyde (or ketone) that is not acid sensitive is heated with zinc amalgam and conc. HCl to obtain hydrocarbon.
CH3CHO+4[H] Zn Hg/ conc HCl−−−−−−−−−ΔCH3CH3+H2O

2) Wolff-Kishner reduction:
Aldehyde (or ketone) that is not base sensitive is treated with hydrazine followed by heating with KOH/ ethylene glycol to obtain hydrocarbon.
CH3CHO+4[H] hydrazine−−−−−−−−−−−−−−KOH/ ethylene glycol ,ΔCH3CH3+H2O+N2

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Reductions Involving Aldehydes or Ketones
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon