Final answer:
The IUPAC nomenclature for alkynes uses the suffix '-yne' to represent a triple bond in the hydrocarbon chain. Alkynes are named in a similar way to alkenes, with the triple bond receiving the lowest possible number in the carbon chain during naming. For example, CH3CH2C≁CH is named 1-butyne.
Step-by-step explanation:
Naming Alkynes with IUPAC Nomenclature
The IUPAC nomenclature system is used to name alkynes in a manner that is similar to alkenes but with some differences. For alkynes, the suffix used at the end of the name is '-yne' to indicate the presence of a triple bond. For example, the molecule CH3CH2C≁CH, with a triple bond between the third and fourth carbon atoms, is named 1-butyne, indicating a four-carbon chain with a triple bond starting at the first carbon.
When numbering the carbon chain, the triple bond must be given the lowest possible number. In the case where both a double and a triple bond are present, the numbering is chosen such that the double bond receives the lower number, but if both could have the same number, preference is given to the double bond.