When CH3 is attached to the benzene ring, it makes the ring a:
Correct answer: B. Good nucleophile
- A. Good electrophile
- B. Good nucleophile
- C. Resonance hybrid
- D. Extraordinary stable
Explanation
Benzene is a nucleophile because of its delocalized electrons thus the molecule has electron-rich areas which are frequently attacked by electrophiles. As alkyl groups have an electron pushing effect, they tend to push the delocalized electrons inside the ring, making it relatively more concentrated in terms of having more electrons gathered in a particular area.
This question appeared on the PMC National MDCAT 2020 paper, which you can sit online with every answer explained.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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