How does one denote a triple bond in organic nomenclature?

In organic nomenclature, a triple bond between carbon atoms is specifically denoted by the suffix "-yne." This suffix indicates that the compound contains at least one carbon-carbon triple bond, and it is a fundamental part of the IUPAC naming convention for alkynes. For example, in the compound ethyne (commonly known as acetylene), the "yne" suffix clearly indicates the presence of a triple bond between the two carbon atoms.

The use of "-ene" is reserved for double bonds, which distinguishes it from "-yne." The prefix "tri-" is not appropriate for indicating triple bonds as it generally refers to the quantity of substituents or specific groups rather than the type of bond between carbons. Lastly, "-al" denotes aldehydes, which also does not relate to the presence of triple bonds. Thus, using the suffix "-yne" is the standardized and correct method of indicating a triple bond in organic nomenclature.