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Reductions Involving Aldehydes or Ketones

The reagent u...

Question

The reagent used in Wolff-Kishner reduction is:

N H_{2} - N H_{2}

and

K O H

in ethylene glycol

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Z n - H g /

conc.

H C l

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N a B H_{4}

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N a - H g / H_{2} O

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Solution

The correct option is B $N H_{2} - N H_{2}$ and $K O H$ in ethylene glycol
The Wolff–Kishner reduction is a reaction used in organic chemistry to convert carbonyl functionalities into methylene groups.
Because the Wolff–Kishner reduction requires highly basic conditions, we use $N H_{2} - N H_{2}$ and $K O H$ in ethylene glycol.

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Similar questions

P h C H O

Z n H C I

L A H

(Z n (H g) / c o n c . H C I)

(N H_{2} N H_{2}

O^{-}

H)

P h C H O

Z n + H C l

Reduction of carbonyl group into –CH₂ in presence of Zn-Hg/HCl is an example of:

	Column I		Column II
(A)	$R C O C H_{3} Z n - H g - --- \to H C l R C H_{2} C H_{3}$	(i)	Wolff-Kishner reduction
(B)	$2 C_{6} H_{5} C H O N a O H - --- \to C_{6} H_{5} C O O N a + C_{6} H_{5} C H_{2} O H$	(ii)	Clemmensen reduction
(C)	$C_{6} H_{6} + C H_{3} C O C l A n h . - -- \to A l C l_{3} C_{6} H_{5} C O C H_{3}$	(iii)	Friedel-Crafts reaction
(D)	$C_{6} H_{10} O (i) N H_{2} N H_{2} - ------------- \to K O H / e t h y l e n e g l y c o l, Δ C_{6} H_{12} + N_{2}$	(iv)	Cannizzaro reaction

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