Which position on a disubstituted benzene ring will a new substituent most likel
Practice Questions
Q1
Which position on a disubstituted benzene ring will a new substituent most likely attach if one substituent is a strong electron-donating group and the other is a weak electron-withdrawing group?
Ortho
Meta
Para
None
Questions & Step-by-Step Solutions
Which position on a disubstituted benzene ring will a new substituent most likely attach if one substituent is a strong electron-donating group and the other is a weak electron-withdrawing group?
Step 1: Understand that a disubstituted benzene ring has two substituents already attached to it.
Step 2: Identify the types of substituents: one is a strong electron-donating group (EDG) and the other is a weak electron-withdrawing group (EWG).
Step 3: Recognize that electron-donating groups activate the benzene ring, making it more reactive towards new substituents.
Step 4: Determine the positions where a new substituent can attach: ortho (next to the existing substituents), meta (one carbon away), and para (opposite side).
Step 5: Note that the strong EDG will have a greater influence on the reactivity of the ring compared to the weak EWG.
Step 6: Conclude that the new substituent will most likely attach at the ortho position because the EDG enhances the electron density there, making it more favorable for substitution.
