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Chapter 22: Problem 49

Name the products formed when the following reagents add to 1-butene. (a) \(\mathrm{H}_{2}\) (b) \(\mathrm{Br}_{2}\)

Short Answer

Expert verified
Question: Identify the products formed when 1-butene undergoes reactions with the following reagents: (1) Hydrogen, (2) Bromine. Answer: The reaction products are (a) Butane, and (b) 1,2-dibromobutane.

Step by step solution

01

Addition of Hydrogen to 1-butene

When 1-butene reacts with hydrogen, it undergoes an addition reaction called hydrogenation, in which hydrogen atoms are added to the carbon atoms that were previously double bonded. This reaction requires a catalyst, typically a metal such as platinum (Pt) or palladium (Pd). The final product is a saturated alkane. Here, the reaction will convert 1-butene to butane: 1-butene + H2 → butane
02

Addition of Bromine to 1-butene

When 1-butene reacts with bromine, it undergoes a halogen addition reaction, in which the halogen atoms are added to the carbon atoms that were previously double bonded. This reaction is a representative of electrophilic addition reaction in alkenes. The final product will be a dihalide. In this case, the reaction will convert 1-butene to 1,2-dibromobutane: 1-butene + Br2 → 1,2-dibromobutane In summary, the reaction products are: (a) Butane (b) 1,2-dibromobutane

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