Re: Alkenes and alkynes... nomenclature issues

Date: Mon Jun 9 14:55:42 2003
Posted By: Dan Berger, Faculty Chemistry/Science, Bluffton College
Area of science: Chemistry
ID: 1054752596.Ch

Message:


The IUPAC standard is that ene-ynes are named "in that order." However, 
numbering is done from "the first branch." Thus, CH3CH::CHCH2C:::CH is called 
4-hexen-1-yne (or sometimes hex-4-en-1-yne).

For more, see IUPAC Rule A-3, 
more specifically subrule A-3.3.

Dan Berger

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