Chemistry - GOC Question with Solution | TestHub
consider the following groups
(A) How many groups can show -M effect when attached to a conjugated system?
(B) How many groups can show +M effect when attached to a conjugated system?
(C) How many groups can show +I effect?
(D) How many groups can show -I effect?
If answer of part (a) is 1, part (b) is 2, part (c) is 3 and part (d) is 4 write 1234 in answer sheet.
Answer:
Solution:
(A) -M effect groups (2): -NO₂ and -CN pull electron density away through resonance.
(B) +M effect groups (5): -OCH₃, -NH₂, -O⁻, -NHCHO, and -OCOCH₃ all contain lone pairs or a negative charge capable of resonance donation.
(C) +I effect groups (2): Strong electron-donating inductive groups like -O⁻ (and related counter-donations).
(D) -I effect groups (5): Highly electronegative groups that inductively withdraw electron density.
Combining these counts gives the final designated code: 2525.
