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How is 2,4-dinitrophenylhydrazine prepar...

How is 2,4-dinitrophenylhydrazine prepared from chlorobenzene?

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To prepare 2,4-dinitrophenylhydrazine from chlorobenzene, we will follow a series of steps involving nitration and subsequent reactions. Here’s a step-by-step breakdown of the process: ### Step 1: Nitration of Chlorobenzene 1. **React chlorobenzene with a nitrating mixture**: - Prepare a nitrating mixture by mixing concentrated nitric acid (HNO3) and concentrated sulfuric acid (H2SO4). - Add chlorobenzene (C6H5Cl) to this mixture. The chlorine atom in chlorobenzene is a para-directing group, which means that the nitro group (NO2) will preferentially attach to the para position relative to the chlorine atom. - The reaction will yield 4-chloronitrobenzene (C6H4Cl(NO2)) and some ortho-nitro products as well. ...
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Knowledge Check

  • Ethyl benzene is prepared from chlorobenzene and what ?

    A
    `C_(2)H_(5)-Cl` in dry ether
    B
    `C_(2)H_(5)-Cl` and Na in dry ether
    C
    `C_(2)H_(5)-Cl` and Mg in dry ether
    D
    `C_(2)H_(5)-Cl` and alc. KOH
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