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Primary halides react slowest with AgNO₃ via SN₁ . CH₃CH₂CH₂I forms AgI (yellow) slowest among the options.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
CH₂=CHCH₂Cl (allyl chloride) forms a stable allylic carbocation via SN₁ , reacting with AgNO₃ to form AgCl .
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
An allylic halide has the halogen on a carbon adjacent to a double bond. CH₃CH=CHCH₂Cl (4-chloro-2-butene) is allylic.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
C₆H₅CH₂Cl (benzyl chloride) forms a stable benzylic carbocation via SN₁ , reacting instantly with AgNO₃ to form AgCl .
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
C₆H₅Cl (chlorobenzene) has a strong C-Cl bond due to sp² hybridization and resonance, making it unreactive in SN₁ with AgNO₃ .
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
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