Which of following has maximum affinity for protonation ?A CH3–C≡N B CH2=CH–NH2 C CH3NH2 D H3C–NH–CH3
Question
Which of following has maximum affinity for protonation ?
A CH3–C≡N
B CH2=CH–NH2
C CH3NH2
D H3C–NH–CH3
Solution
To determine which of the given compounds has the maximum affinity for protonation, we need to consider their respective functional groups and their ability to accept a proton.
A) CH3–C≡N: This compound contains a carbon triple bond (C≡N) known as a nitrile group. Nitriles are weak bases and have a moderate affinity for protonation.
B) CH2=CH–NH2: This compound contains an amino group (NH2) attached to a carbon-carbon double bond (CH2=CH). Amines are stronger bases than nitriles and have a higher affinity for protonation.
C) CH3NH2: This compound is a primary amine, which means it has a nitrogen atom bonded to three hydrogen atoms (NH2). Primary amines are stronger bases than both nitriles and secondary amines, and therefore have a higher affinity for protonation.
D) H3C–NH–CH3: This compound is a secondary amine, with a nitrogen atom bonded to two methyl groups (CH3). Secondary amines are weaker bases than primary amines but still have a higher affinity for protonation than nitriles.
Based on the information above, we can conclude that compound C (CH3NH2) has the maximum affinity for protonation among the given options.
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