Alkenes: preparation (dehydration, dehydrohalogenation), electrophilic addition, Markovnikov's rule, peroxide effect
Hydrocarbons · Chemistry
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Problem: Predict the major product formed when propene reacts with hydrogen bromide (HBr) in the presence of benzoyl peroxide. Step 1: Identify the reactant molecule as propene, which is an unsymmetrical alkene (CH3-CH=CH2). Step 2: Note the reagents used, which are HBr and benzoyl peroxide. Step 3: Recognize that the presence of peroxide triggers the peroxide effect (anti-Markovnikov addition). Step 4: Apply the anti-Markovnikov rule where the electrophilic hydrogen attaches to the carbon with fewer hydrogens, and the bromine attaches to the carbon with more hydrogens. Step 5: Write the final major product formed, which is 1-bromopropane (CH3-CH2-CH2Br).
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