Question:
How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?
How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?
Updated On: Nov 23, 2024
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Correct Answer: 4
Solution and Explanation
Step 1: Analyze each compound - Compound 1 (−OCH3 group attached): The −OCH3 group exhibits both inductive (−I) and mesomeric (+M) effects. However, hyperconjugation is not applicable here. Not included.
- Compound 2 (Alkene with −CH3): The −CH3 group shows inductive (+I) and hyperconjugation effects due to the presence of alpha hydrogens. Mesomeric effect is not present. Not included.
- Compound 3 (−NO2 group): The −NO2 group exhibits both −I (inductive) and −M (mesomeric) effects but does not participate in hyperconjugation. Not included.
- Compound 4 (−Cl group): The −Cl group shows −I (inductive) and +M (mesomeric) effects, but no hyperconjugation. Not included.
- Compound 5 (−NO2 group): Similar to Compound 3, exhibits inductive and mesomeric effects but not hyperconjugation. Not included.
- Compound 6 (−CH3 groups attached to a benzene ring): The −CH3 groups exhibit inductive (+I) effects and hyperconjugation due to alpha hydrogens. Mesomeric effect is also observed with the aromatic ring. Included.
- Compound 7 (−COCH3 group): The −COCH3 group exhibits inductive (−I) and mesomeric (−M) effects. However, no hyperconjugation is observed. Not included.
Step 2: Final Count From the analysis, only 4 compounds exhibit all three effects: inductive, mesomeric, and hyperconjugation.
Final Answer: 4.
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