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Which of the statements are WRONG about the nucleophilic addition reaction of alkenes and alkynes?

A

Addition of nucleophile `(Roverset(Ө)O)` to alkene gives an alkyl carbanion whose negative charge is on the `sp^3`-hydridised C atom.

B

Addition of nucleophile `(Roverset(Ө)O)` ot an alkyne gives a vinyl carbanion whose negative charge is on the `sp^2`-hybridised C atom. Due to more s character, it is readily formed and more stable than alkyl carbanion formed with alkenes. So alkynes are more reactive than alkenes towards NA reaction.

C

Strong electron-withdrawing inductive effect `(-I)` further stabilises both vinyl and alkyl carbanion.

D

Strong electron-donating inductive effect `(+I)` further stabilises both vinyl and alkyl carbanion.

Text Solution

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The correct Answer is:
D
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CENGAGE CHEMISTRY-ALKYNES-Exercises (Multiple Correct Answers Type)
  1. Which statement(s) is/are WRONG?

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  2. Which of the statements are correct about the reactivities of alkene, ...

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  3. Which of the statements are WRONG about the nucleophilic addition reac...

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  4. In the following sequence of reactions, Which of the statements a...

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  5. Acetylene is thermodynamically unstable and readily explodes, therefor...

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  6. Which of the statements are correct for alkyne with molecular formula ...

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  7. For the conversion of alkyne to cis-alkene, H2+ Lindlar's catalyst is ...

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  8. i. Me--=-Hunderset((ii)H2O2//overset(Ө)OH)overset((i) Sia2BH)rarrA i...

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  9. Which of the following statements are correct?

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  10. Which of the following statement(s) is/are correct:

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  11. Compound (B) is same when (A) is:

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  12. Which of the statements are correct? R--=-R^'underset(+EtOH)overset(...

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  13. Which of the statements are correct? R--=-Runderset(Catalyst)overset...

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  14. Hydroboration oxidation and acid hydration will yield the same product...

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  15. C4H6underset(1 mol)overset(H2+Pt)rarrC4H8overset(O3//H2O)rarr Acedic a...

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  16. All reagents, [Cu(NH3)2]^(o+), [Ag(NH3)2]^(o+), CH3MgBr, and NaNH2 r...

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  17. Compound (A) does not react with Tollens or Grignard reagent, but afte...

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  18. Compound (A) reacts with [Cu(NH3)2]^(+) and Tollens reagent, but after...

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  19. Which of the statements are correct?

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  20. Reagents used in conversion from (A) to (B) are:

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