Identify the correct decreasing order of nucleophilicity for the following amines: (i) (ii) (iii)

Step-by-step solution

Nucleophilicity of amines depends on the availability of the lone pair on the nitrogen atom for attack on an electrophile. Steric hindrance plays a major role in determining nucleophilicity; greater steric crowding around the nitrogen atom significantly decreases its nucleophilicity. In compound (i) (quinuclidine), the alkyl groups are constrained in a rigid bicyclic ring system. This structural feature "ties back" the alkyl chains, exposing the lone pair on the nitrogen atom. Due to minimal steric hindrance, it is