Which of the following groups would decrease the electron density on a benzene r

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Question: Which of the following groups would decrease the electron density on a benzene ring?

Options:

Correct Answer: -NO2

Solution:

-NO2 is a strong electron-withdrawing group that decreases electron density on the benzene ring.

Which of the following groups would decrease the electron density on a benzene ring?

Which of the following groups would decrease the electron density on a benzene ring?

Step 1: Understand what electron density means. Electron density refers to the distribution of electrons in a molecule, which affects its reactivity.
Step 2: Identify the structure of a benzene ring. A benzene ring is a six-carbon ring with alternating double bonds, which can attract electrons.
Step 3: Learn about electron-withdrawing groups. These are groups that pull electrons away from the benzene ring, decreasing its electron density.
Step 4: Recognize the -NO2 group (nitro group) as an example of a strong electron-withdrawing group. It pulls electrons away from the benzene ring.
Step 5: Conclude that the presence of -NO2 on a benzene ring will decrease the overall electron density of the ring.

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