Study GuideOrganic Chemistry I–Summary of Preparations1.Preparations:AlkenesAlkenes can be prepared using different reactions. Let’s look atthree main methods:1. Dehydrohalogenation of Alkyl Halides•What happens?In this reaction, an alkyl halide (a molecule with a halogen atom attached to a carbon chain)undergoes elimination of ahydrogen atomand ahalide ion(X).•What’s used?A strong base likeKOHin alcohol is used under heat.•Reaction:2. Dehydration of Alcohols•What happens?In a dehydration reaction, an alcohol loses awater molecule, forming adouble bondbetweenthe carbon atoms.•What’s used?This reaction requiresconcentrated sulfuric acid (H₂SO₄)and heat.•Reaction:Preview Mode
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