The rules for naming alkynes are the same as those for alkenes, except that the ending -yne is used to denote the presence of the triple bond.
Follow these steps to name complex alkynes:
for example; Name the following alkyne:
Step 1: Identify the longest continuous chain of carbon atoms containing both carbon atoms of the triple bond, and assign the respective prefix to get the name of the parent hydrocarbon.
Step 2: Number the main chain beginning at the end that is closest to the triple bond, so that the carbon triple bond will have the lowest possible number value.
Step 3: Name each substituent (branch) and indicate its position by the number of the carbon atom which the branch is attached to. For example, we can have methyl groups attached to a given carbon atom in the chain.
Put the three parts together with hyphens to separate the names and commas to separate the numbers, and you have the name of the alkyne.
Note: This system of naming organic compounds is called the IUPAC (International Union of Pure And Applied Chemistry) System
Here are some rules for the prefixes:
