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Comprehensive Review of Alkenes and Alkynes: Structures, Formulas, and Naming Conventions

This detailed overview provides insights into the structure and reactivity of alkenes and alkynes, two important classes of unsaturated hydrocarbons. It covers the necessary structural formulas, including examples like nonane, 2,4,7-trimethyl nonane, and methylcyclopentane. Key concepts include defining alkenes and alkynes, their general formulas (CnH2n for alkenes and CnH2n-2 for alkynes), and their naming conventions. This resource is ideal for chemistry students seeking to enhance their understanding of hydrocarbon reactivity and nomenclature.

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Comprehensive Review of Alkenes and Alkynes: Structures, Formulas, and Naming Conventions

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  1. Chemistry Chapter 22 Notes #3 Alkenes and Alkynes

  2. review • Draw the following • Nonane • 2,4,7 trimethyl nonane • 2,3 dimethyl 5 propyl decane • 4 isopropyl heptane • Methylcyclopentane • 1,3 diethyl cyclobutane • 1,2,2,4 tetramethylhexane

  3. Alkenes • Unsaturated Hydrocarbons • At least one double bond in the carbon chain • More reactive than alkanes • Formula • CnH2n • To figure out number of Hydrogen's • Names end in –ene • Ex. Ethene

  4. Alkene Examples • Butene • 3,4 dimethyl 2pentene • Why is it numbered that way? • 1,5 octadiene • 4 butyl cyclohexene

  5. Alkynes • Unsaturated Hydrocarbons • At least one triple bond in the carbon chain • More reactive than alkanes and alkenes • Formula • CnH2n - 2 • To figure out number of Hydrogen's • Names end in –yne • Ex. Ethyne

  6. Alkyne Examples • Butyne • 4-heptyne • 4ethyl, 2 methyl, 1 hexyne

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