When thesamesidechainsarepresentuseprefixesdi2tri3etc

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Unformatted text preview: system, a familiarit y wit h co mmon alkyl groups is necessary. Alkyl groups have the general formula CnH2n+1 and are named based on the corresponding alkanes. Some commo n alkyl groups include: CH3¾ methyl CH3CH2¾ ethyl n­propyl CH3CH2CH2¾ CH3 ï CH3CHCH2¾ isobut yl ï CH3CHCH3 isopropyl IUPAC Rules for Naming Alkanes: 1. Select the longest continuous chain of carbons as the parent compound. All the other groups are considered side chains. 2. Number the carbon atoms in the parent chain so that the side chains fall on the smallest numbers. 3. Name each side chain alkyl group and designate its posit ion on the parent chain by the carbon number. Side chains should be listed in alphabet ical order. 4. Each side chain must possess a number designat ing its position on the parent chain. When the same side chains are present, use prefixes di­(2), tri­(3), etc. 11 Chemistry 52 Chapter 19 Examples: Name each co mpound shown below using the IUPAC system: 1. CH3CH2CH2CHCH3 ï CH3 2. CH3CH2CH2CHCH3 ï CH3CHCH3 3. CH3CHCH3 ï Cl 4. CH3 | CH3CHCH2CHCH3 ï CH2CH3 12 Chemistry 52 Chapter 19 REACTIONS OF ALKANES · Alkanes undergo two important reactions: Halogenation Dehydrogenation (Substitution) (Elimination) Halogenation: · Halogens can react with alkanes in presence of light to substitute for a hydrogen and form mono­substituted alkyl halides. RH + X2 ¾...
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This document was uploaded on 03/18/2014 for the course CHEM 52 at Los Angeles Mission College.

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