How to Name a Compound That Has More than One Functional Group

2 HOW TO NAME A COMPOUND THAT HAS MORE THAN ONE FUNCTIONAL GROUP 

We have seen how compounds with two double bonds are named (Section 5.2). Similar rules are followed for naming compounds with two triple bonds, using the ending diyne.  

To name an alkene in which the second functional group is not another double bond but has a functional group suffix, find the longest continuous chain containing both functional groups and put both suffixes at the end of the name. Put the ene ending first, with the terminal e omitted to avoid two adjacent vowels. 

When the functional groups are a double bond and a triple bond, the chain containing both groups is numbered in the direction that produces the name containing the lowest possible number, regardless of which functional group gets the lower number. 

If the same low number is obtained in both directions, number the chain in the direction that gives the double bond the lower number. 

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How to Name a Compound That Has More than One Functional Group 303... 

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