Chapter 4 Naming - An introduction to the IUPAC system of...

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Chapter 4 - Naming Alkanes (4.3-4.5) An introduction to the IUPAC system of nomenclature The names of organic molecules may be divided into 3 parts: The Parent Name: Memorize This FLASHCARD TIME! C atoms in chain Parent Name C atoms in chain Parent Name 1 meth 7 hept 2 eth 8 oct 3 prop 9 non 4 but 10 dec 5 pent 11 undec 6 hex 12 dodec The Alkyl Groups: Memorize This! Putting It All Together 1. For a branched-chain hydrocarbon , the alkane corresponding to the longest chain is taken as the parent chain . If there are two chains of equal length , pick the chain with the most substituents (the branches) as the parent chain . 2. Each substituent is given a name and number .
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3. If there is one substituent , find the longest chain that the substituent is attached to and number from the end of the chain that gives the substituent the lower number . 4. If the substituent occurs more than once , number the chain from the end to give the lowest number to the substituent encountered first . The number of times it occurs is shown by di-, tri-, tetra-, penta-, hexa-, hepta-, etc.
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This note was uploaded on 05/15/2011 for the course CHM 116 taught by Professor Matchett during the Fall '11 term at Grand Valley State University.

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Chapter 4 Naming - An introduction to the IUPAC system of...

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