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प्रश्न
Explain the following reactions:
Wolff Kishner reduction
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.
Write the structures of the main products when acetone (CH3 − CO − CH3) reacts with the following reagent :
Zn − Hg/conc. HCl
How will you bring about the following conversion in not more than two steps?
Propanone to Propene
How will you bring about the following conversion in not more than two steps?
Benzoic acid to m-Nitrobenzyl alcohol
Predict the products of the following reactions :
Predict the products of the following reactions :
Predict the main product of the following reaction:\[\begin{array}{c}
\ce{O\phantom{----}O\phantom{-}}\\
\ce{||\phantom{----}||\phantom{-}}\\
\ce{CH3-C-CH2-C-OCH3}
\end{array}\ce{->[(i)NaBH4][(ii)H+]}\]
Reduction of > C = O to CH2 can be carried out with
Explain the following reactions:
Clemmensen reaction
Write the main product in the following reaction:
\[\ce{CH3CH2CHO ->[Zn(Hg)/Conc. HCl]}\]
