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Identify number of substituents those a...

Identify number of substituents those are dectivating but ortho and para direacting

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Number of following substituents those are deactivating but ortho and para directing.

Explain ortho and para hydrogen.

Knowledge Check

  • Ortho and para hydrogen have

    A
    identical physical and chemical properties
    B
    different physical but identical chemical properties
    C
    identical physical but different chemical properties
    D
    different physical and chemical properties .

  • The Common ortho and para directing group is

    A
    `-OH`
    B
    `-CHO`
    C
    `-NO_2`
    D
    None of these

  • The Common ortho and para directing group is

    A
    `-OR`
    B
    `-CJO`
    C
    `-NO_2`
    D
    None of these

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    Ortho and para hydrogen have :

    In the electrophilic substituion of benzene ring, the second substituent is directed by the group already present. Electron releasing groups (+I and +M) are ortho-para-directing and activating, whreas the electron withdrawing groups (-I and -M) are meta-directing and deactivating. Halogens are placed under the category of +T (Tautomeric) groups because they have -Ibdyctuve abd +Mesomeric effect. These groups are deactivating but ortho-para-directing. In the introduction of third group to the benzene ring, the product of minimum steric gindrance is formed. Which of the following is not an ortho, para-directing group ?

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