Among the following amines, the strongest Brönsted base is __________.
• The main reason behind the basic properties of cyclopentyl amine is the availability of unshared electrons on the nitrogen atoms which allows the ease of protonation on the N atom and forming of cation by interacting with acids.
• And also the cyclopentyl ring makes the N more nucleophilic (electron-donating tendency, through the effect of hyperconjugation) it has more basic strength even more than ammonia.
• (i) might be weakest base among them due to conjugation of the –NH2 group with the benzene ring which eventually makes the lone pair on N atoms less available, which is also partially the case for (iii) also.
• Amines are generally stronger bases than (ii) NH3 because the n atoms in amines have more ability to form dative bonds with H s, as they have more nucleophilic N atom (more nucleophilic the N atom, more will be the basicity).
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Match the compounds given in Column I with the items given in Column II.
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