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Which of the following substituted benze...

Which of the following substituted benzene derivatives would produce three isomeric products when one more substituent is introduced ?

A

I,II and III

B

I and III

C

II and IV

D

I and IV

Text Solution

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The correct Answer is:
B
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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 substituted benzene derivatives would furmish three isomers when one more substituent is introduced ?

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ALLEN-ALKENE, ALKANE & ALKYNE -EXERCISE-1
  1. The dipole moment of chlorobenzene is 1.6Dm The expected dipole moment...

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  2. In the nitration of benzene with a mixture of concentrated HNO(3) and ...

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  3. Which of the following substituted benzene derivatives would produce t...

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  4. In the sulphonation of benzene, the active electrophilic species is

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  5. The Friedel-Crafts reaction of benzene with n-butyl chloride at 0^(@)C...

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  6. Sulfonation differs from most of electrophilic aromatic substitution r...

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  7. Cumene on treatment with KMnO(4) gives -

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  8. Benzene reacts with CH(3)COCl in the presence of anhydrous AlCl(3) to ...

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  9. underset(FeBr(2))overset(Br(2))rarrA (Major product), then the major...

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  10. Arrange the following in correct activating order towards EAS - {:(u...

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  11. Consider the following reaction sequence, CH(3)C-= CH overset(aq.H(2...

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  12. Consider the following reaction sequence CH(3)C-=Chunderset(" 2 mole...

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  13. Consider the following chlorides: The order of reactivity of A, B...

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  14. In the following reaction sequence Ph -C -= CH underset(Hg^(2+)) ove...

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  15. Consider the following reaction. CH(3)overset(O^(16))overset(||)C-O^...

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  16. Consider the following reaction sequence, underset(2 H(2)O)overset ...

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  17. Propene is allowed to react with m-chloroperoxybenzoic acid. The produ...

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  18. 2-Phenylethanol may be prepared by the reaction of phenyl magnesium br...

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  19. In the reaction the product (B) is:

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  20. The final product in the reaction is : Ph-OH+C Cl(4)overset(KOH)rarr...

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