MEDIUMMCQ SINGLENEET ChemistryInorganic ChemistryAlkyl and Aryl HalidesE elimination follows an antiperiplanar structure

Alc.KOH CH CH CH Br -> Final product is (JIPMER 2019)

A.Propene✓ Correct

B.propanol

C.cyclopropane

D.propane-1,2-diol

Explanation

When haloalkanes containing β-hydrogen atom is heated with alc. KOH solution, then alkene is formed. . 3 2 2 3 2 Propene -> Alc KOH CH CH CH Br CH CH CH In this reaction, hydrogen is eliminated for β-carbon and the halogen is lost form α-carbon atom of 1- bormoproapne. As a result, an alkene is formed as a product. Due to the involvement of elimination of β- hydrogen is often called β-elimination.

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