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Which of the following has the highest v...

Which of the following has the highest value of `K_(b)` ?

A

o-Toluidine

B

p-Toluidine

C

m-Toluidine

D

Aniline

Text Solution

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The correct Answer is:
B
Highest `K_(b)` implies strongest base The correct order of basicity is p-Toluidine gtm-ToluidinegtAnilinegto-Toluidine Methy1 (a typical alky1 group) is inductively electron donating and base strenghtening from all positions Moreover `CH_(3)` (on account of benzylic hydrogens) is electorn donating by hyperconjugation from only the ortho and para positions o-Toluidine is least basic on account of hyperconjugation as well as inductive effect m-Toluidine is less basic than p-toluidine on account of only +I effect .
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R SHARMA-AMINES-Follow -up Test
  1. Which of the folllowing has the highest pK(b) ? .

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  2. Which of the following is least basic . ?

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  3. Which of the following has the highest value of K(b) ?

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  4. Which of the following is most basic ?.

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  5. The correct order of the basicities of the following comounds is . ...

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  6. Among the following compounds the correct order of basicity is .

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  7. Which of the following is least basic .

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  8. Which of the following is least basic .

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  9. Which of the following iscorrect ? (a) the conjugate acid of HO(CH(2...

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  10. When treaded with excess of methy1 iodide mehtylamine leads to a nucle...

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  11. The structure of C in the following sequence of reactions CH(3)CH(2)...

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  12. [CH(3)CH(2)CH(2)overset(+NMe(3))overset(|)(CHCH(3))]OHoverset(Delta)ra...

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  13. Which of the following quaternary ammonium hydroxides undergoes Saytze...

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  14. The thermal decomposition of the hydroxide salt of Ph overset(+)NM e(3...

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  15. The products (A) and (B) of the reaction CH(3)CH(2)NH(2)underset(hea...

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  16. Which of the following does not react with benzy1 chloride ?

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  17. Benozylation of primary and secondary amines with benzoy1 chloride in ...

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  18. Which of the following compound on treatment with benzenesulphony1 chl...

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  19. The reaction of p- aminophenol with one equivalent of acety1 chloride ...

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  20. Which of the following compounds does not react with 1^(@) and 2^(@) a...

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