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Multiple Choice
In the context of organic chemistry, when does a nucleophilic substitution reaction typically occur?
A
When a nucleophile attacks an electrophilic carbon atom
B
When a molecule undergoes oxidation
C
When a molecule absorbs ultraviolet light
D
When a radical is formed during a reaction
Verified step by step guidance
1
Understand the concept of a nucleophilic substitution reaction: It involves a nucleophile, which is an electron-rich species, attacking an electrophilic center, typically a carbon atom that is electron-deficient.
Identify the characteristics of a nucleophile: Nucleophiles are species that have a pair of electrons to donate, such as OH-, CN-, or NH3.
Recognize the role of the electrophilic carbon: In organic molecules, an electrophilic carbon is often bonded to a leaving group, which can be displaced by the nucleophile.
Differentiate nucleophilic substitution from other reactions: Oxidation involves the loss of electrons, absorption of ultraviolet light involves electronic transitions, and radical formation involves homolytic bond cleavage, none of which are related to nucleophilic substitution.
Conclude that a nucleophilic substitution reaction occurs when a nucleophile attacks an electrophilic carbon atom, leading to the displacement of a leaving group.