Which of the following is the strongest Bronsted base?
Show Hint
The Correct Option is D
Solution and Explanation
Step 1: Understanding Bronsted Bases
A Bronsted base is a substance that can accept protons. The strength of a Bronsted base depends on: 1. The availability of a lone pair for protonation. 2. The electron-donating or withdrawing effects of the surrounding groups.
Step 2: Evaluating Each Structure
Structure 1 has electron-withdrawing effects, reducing basicity.
Structure 2 has delocalization of the lone pair, reducing its basicity.
Structure 3 is in a constrained ring, affecting electron availability.
Structure 4 has a localized lone pair, making it the most basic.
Thus, the correct answer is (D).
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