Editing Alkyne (section)

==Naming alkynes==
In [[Chemical nomenclature|systematic chemical nomenclature]], alkynes are named with the Greek prefix system without any additional letters. Examples include ethyne or octyne. In parent chains with four or more carbons, it is necessary to say where the triple bond is located. For [[octyne]], one can either write 3-octyne or oct-3-yne when the bond starts at the third carbon. The lowest number possible is given to the [[triple bond]]. When no superior functional groups are present, the parent chain must include the triple bond even if it is not the longest possible carbon chain in the molecule. Ethyne is commonly called by its trivial name acetylene.

In chemistry, the [[affix|suffix]] '''[[-yne]]''' is used to denote the presence of a triple bond. In [[organic chemistry]], the suffix often follows [[Chemical nomenclature|IUPAC nomenclature]]. However, [[inorganic compound]]s featuring [[Saturated and unsaturated compounds|unsaturation]] in the form of triple bonds may be denoted by substitutive nomenclature with the same methods used with alkynes (i.e. the name of the corresponding saturated compound is modified by replacing the "[[-ane]]" ending with "-yne"). "[[Polyyne|-diyne]]" is used when there are two triple bonds, and so on. In case of multiple triple bonds, the position of unsaturation is indicated by a numerical [[locant]] immediately preceding the "-yne" suffix, or 'locants'. Locants are chosen so that the numbers are low as possible. "-yne" is also used as a suffix to name substituent groups that are triply bound to the parent compound.

Sometimes a number between [[hyphen]]s is inserted before it to state which atoms the triple bond is between. This suffix arose as a collapsed form of the end of the word "[[acetylene]]". The final "-e" disappears if it is followed by another suffix that starts with a vowel.<ref>{{Cite book |author=The Commission on the Nomenclature of Organic Chemistry |title=Nomenclature of Organic Chemistry |orig-year= 1958 (A: Hydrocarbons, and B: Fundamental Heterocyclic Systems), 1965 (C: Characteristic Groups) |year=1971 |edition=3rd |publisher=Butterworths |location=London |isbn= 0-408-70144-7}}</ref>