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HI with red phosphorus converts 1-butanol to 1-iodobutane ( CH₃CH₂CH₂CH₂I ) via substitution.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
For 1-butene ( CH₃CH₂CH=CH₂ ), HI adds via Markovnikov's rule, forming CH₃CH₂CHICH₃ (2-iodobutane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
For 2-pentene ( CH₃CH₂CH=CHCH₃ ), HI adds via Markovnikov's rule, forming CH₃CH₂CHICH₂CH₃ (3-iodopentane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes
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