4 Handout (Naming)(1)

4 Handout (Naming)(1) - 4) Write out the name in the format...

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Ken Shimizu Naming Handout General Rules: 1) Find the longest continuous linear chain of carbons in the parent alkane -If there are two chains of equal length, the chain with a greater number of substituents is the parent alkane # of carbons parent name substituent name 1 methane methyl 2 ethane ethyl 3 propane propyl 4 butane butyl 5 pentane pentyl 6 hexane hexyl 7 heptane heptyl 8 octane octyl 9 nonane nonyl 10 decane decyl 2) Name any substituents attached to the parent alkane -Group substituents that are repeated using the prefixes (di-, tri-, tetra- etc.) -Order the substituents in alphabetical order w/o prefixes ie. ethyl before methyl ethyl before dimethyl (disregard the prefixes di- or tri-) iso and neo are not prefixes (so iso- propyl comes before methyl) 3) Number the parent alkane - Start from the end that is closest to a substituent* *if two choices are possible: a) start from the end where the second substituent is closest b) if everything else is the same, go alphabetically
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Unformatted text preview: 4) Write out the name in the format #,#-prefix substituent-#-prefix substituent parentalkane Examples: 1 2 5 6 9 2,6-dimethyl-5-propyl nonane 1 2 3 7 3-ethyl-2-methyl heptane not 3-i sopropyl heptane Cl 1 4 2 5 6 4-tert-butyl-6-chloro-2,3-dimethyl heptane Ken Shimizu Branched Alkanes: Common names (not IUPAC) isopropyl isobutyl sec-butyl tert-butyl IUPAC names: isopropyl = (1-methylethyl) isobutyl = (2-methylpropyl) sec-butyl = (1-methylpropyl) tert-butyl = (2,2-dimethylethyl) Other Functional Groups F fluoro Cl chloro Br bromo I iodo phenyl Cycloalkanes (Rings) Parent Structure is the Cycloalkane: cyclopropane cyclobutane cyclopentane cyclohexane Otherwise the naming rule are the same: 1,1-dimethyl cyclohexane 1 2 1-ethyl-2-methyl cyclobutane Number the ring in the direction that gives the lowest numbers.* * If there are two possible directions and places to start then go alphabetically....
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This note was uploaded on 02/03/2012 for the course CHEM 333 taught by Professor Lavigne during the Spring '09 term at South Carolina.

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4 Handout (Naming)(1) - 4) Write out the name in the format...

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