Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
Correct answer: B. they have an electrophilic carbon & a good leaving group
- A. they have an electrophilic carbon
- B. they have an electrophilic carbon & a good leaving group
- C. they have an electrophilic carbon & a bad leaving group
- D. they have a nucleophilic carbon & a good leaving group
Explanation
The carbon bonded to halogen is electron-deficient because the halogen withdraws electron density, making that carbon electrophilic. The halide ion can leave, so the molecule has both an electrophilic carbon and a leaving group. Students may choose option a if they forget that a good leaving group is also essential for rapid nucleophilic reaction.
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About Nucleophilic Substitution
Nucleophilic substitution replaces a leaving group in an alkyl halide when an electron-rich nucleophile attacks the carbon atom. The topic compares SN1 and SN2 mechanisms, including reaction conditions, substrate structure, solvent effects, nucleophile strength, carbocation formation and stereochemical changes, and distinguishes substitution from elimination.
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