question_answer

The reaction,\[{{R}_{2}}C=NN{{H}_{2}}\xrightarrow[{}]{{{C}_{2}}{{H}_{5}}ONa}{{R}_{2}}C{{H}_{2}}+{{N}_{2}}\]is called

A)  Clemmensen reduction

B)  Hunsdiecker reaction

C)   Tischenko reaction

D)  Wolff-Kishner reduction

Correct Answer: D

Solution :

                \[\xrightarrow[\begin{smallmatrix}  ethylene\text{ }glycol, \\  Wolff-Kishner  \\  reduction \end{smallmatrix}]{{{C}_{2}}{{H}_{5}}ONa}\underset{alkane}{\mathop{R-C{{H}_{2}}-R}}\,+{{N}_{2}}\] Carbonyl compounds give alkane, on reaction with a mixture of hydrazine and\[C{{ & }_{2}}{{H}_{5}}ONa\]in the presence of ethylene glycol. This reaction is called Wolff-Kishner reduction.