Ch_322a_7.01

Ch_322a_7.01 - Chapter 7 Alkenes and Alkynes: Properties...

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Chapter 7 Alkenes and Alkynes: Properties and Synthesis. Elimination Reactions of Alkyl Halides Alkenes and alkynes are unsaturated hydrocarbons with double and triple bonds, respectively. C C C C alkene alkyne double bond triple bond All the simple alkenes (ethene, propene, isobutene) are important industrial chemicals produced in billions of pounds per year in the United States each year. Ethyne (acetylene) also is an important industrial chemical. An older name "olefin" is sometimes used for an alkene. Ethene (ethylene) was once called olefiant gas (Latin: oleum , oil+ facere , to make), since it reacts with Cl 2 to produce an oil, C 2 H 4 Cl 2 .
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Physical Properties of Alkenes and Alkynes Alkenes and alkynes have boiling points and melting points similar to alkanes of comparable size. The unsaturated hydrocarbons are only very slightly soluble in water and have densities less than water. The Importance of Packing Forces
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Ch_322a_7.01 - Chapter 7 Alkenes and Alkynes: Properties...

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