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प्रश्न
Explain the following reaction:
Wolff-Kishner reduction
Explain Wolf-Kishner reduction reaction.
Explain the following reaction and write the chemical equation involved:
Wolff-Kishner reduction
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उत्तर
In this reaction, the reduction of carbonyl compounds to hydrocarbons takes place by heating them with hydrazine and a base to form hydrazine which is further reduced to form a methylene group along with nitrogen gas.
\[\begin{array}{cc}
\phantom{..}\ce{R}\phantom{....................................}\ce{R}\phantom{......................................}\ce{R}\phantom{.......................}\\
\phantom{..}\backslash\phantom{.....................................}\backslash\phantom{......................................}\backslash\phantom{...................}\\
\phantom{....}\ce{C = \underset{Hydrazine}{O + H2N - NH2} -> C = N - NH2 ->[glycol + KOH][180°C] CH2 + N2(g)}\\
\phantom{..}/\phantom{.....................................}/\phantom{......................................}/\phantom{...................}\\
\phantom{............}\ce{\underset{Carbonyl compound}{R'}}\phantom{........................}\ce{R'}\phantom{................................}\ce{\underset{Hydrocarbon}{R'}}\phantom{.................................}
\end{array}\]
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संबंधित प्रश्न
Write the chemical reaction involved in Wolff-Kishner reduction.
Predict the products of the following reactions :
Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
Zinc amalgam and dilute hydrochloric acid
How will you bring about the following conversion in not more than two steps?
Propanone to Propene
Complete the synthesis by giving missing starting material, reagent or product.
\[\ce{CH3COCH2COOC2H5 ->[(i) NaBH4][(ii) H+]}\]
Predict the products of the following reactions :
Predict the main product of the following reaction:\[\begin{array}{c}
\ce{O\phantom{----}O\phantom{-}}\\
\ce{||\phantom{----}||\phantom{-}}\\
\ce{CH3-C-CH2-C-OCH3}
\end{array}\ce{->[(i)NaBH4][(ii)H+]}\]
Write chemical equation of the following reaction :
Acetophenone is treated with `("Zn"("Hg"))/"Conc.HCl"`.
Reduction of > C = O to CH2 can be carried out with
Write the main product in the following reaction:
\[\ce{CH3CH2CHO ->[Zn(Hg)/Conc. HCl]}\]
