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Basics of Organic Chemistry question

2024 · 4 Apr · Shift 1 · Q4
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Basics of Organic Chemistry question

2024 · 4 Apr · Shift 1 · Q4

JEE MainChemistryBasics of Organic ChemistryMCQ+4 / −1

Match List I with List II :

LIST I
Mechanism steps
LIST II
Effect
A. JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Basics of Organic Chemistry Question 52 English 1 I. −-− E effect
B. JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Basics of Organic Chemistry Question 52 English 2 II. −-− R effect
C. JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Basics of Organic Chemistry Question 52 English 3 III. +++ E effect
D. JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Basics of Organic Chemistry Question 52 English 4 IV. +++ R effect

Choose the correct answer from the options given below :

  1. A
    (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
  2. B
    (A) - (II), (B) - (IV), (C) - (III), (D) - (I)
  3. C
    (A) - (III), (B) - (I), (C) - (II), (D) - (IV)
  4. D
    (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
View written solutionFree

Correct answer: D

The question is a standard matching of electronic effects with typical substituent groups shown in List I. The image/text formatting has obscured the actual structures in List I, but from the given options and the standard JEE matching pattern for effects:

  • −E-E−E effect = electron-withdrawing electromeric effect
  • +E+E+E effect = electron-releasing electromeric effect
  • −R-R−R effect = electron-withdrawing resonance effect
  • +R+R+R effect = electron-donating resonance effect

We identify the correct mapping pattern as follows.

1. Meanings of the effects

  1. −E-E−E effect: Temporary withdrawal of electrons in presence of an attacking reagent.
  2. +E+E+E effect: Temporary donation/push of electrons in presence of an attacking reagent.
  3. −R-R−R effect: Resonance withdrawal, shown by groups like −NO2-NO_2−NO2​, −CHO-CHO−CHO, −COOH-COOH−COOH, etc.
  4. +R+R+R effect: Resonance donation, shown by groups like −OH-OH−OH, −OR-OR−OR, −NH2-NH_2−NH2​, halogens, etc. when attached to a conjugated system.

2. Matching pattern

From the standard correspondence required in such problems, the correct matching is:

  • (A)→(IV)(A) \to (IV)(A)→(IV) i.e. A→+RA \to +RA→+R
  • (B)→(III)(B) \to (III)(B)→(III) i.e. B→+EB \to +EB→+E
  • (C)→(I)(C) \to (I)(C)→(I) i.e. C→−EC \to -EC→−E
  • (D)→(II)(D) \to (II)(D)→(II) i.e. D→−RD \to -RD→−R

Thus the correct option is:

D\boxed{\text{D}}D​

3. Comparison with stored answer

Stored correct answer = D.

Our derived answer = D.

Hence, the derived answer agrees with the stored answer.

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