CHEM 2OA3 Chapter 4: Chapter 4 Alkanes and Cycloalkanes.docx

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Hydrocarbons that lack bonds are called saturated hydrocarbons, or alkanes. Naming substituents: named with same terminology used for naming parents, except add letters. Yl : table 4. 2, when an alkyl group is connected to a ring, ring is generally treated as parent, however, only true when ring is comprised of more carbon atoms than alkyl group. Naming complex substituents: naming branched alkyl substituents is more complex than naming straight-chain substituents, begin by placing numbers on substituent, going away from parent chain. 2: place numbers on longest straight chain present in substituent (4 carbons. An alkyl group bearing three carbons can only be branched in one way and is called an isopropyl group. Alkyl groups bearing four carbon atoms can be branched in three different ways. Alkyl groups bearing five carbon atoms can be branched in many more ways, but here are two common ways.