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The copper-catalyzed reaction between an azide and this group is fundamental to click chemistry and is called the Huisgen cyclo-addition. The formation of a di-bromo-alkene is an intermediate step in the preparation of this functional group from an aldehyde in the Cory-Fuchs reaction. A lead-poisoned palladium catalyst named for Lindlar can be used in the partial hydrogenation of this functional group. "Terminal" examples of these functional groups are sp hybridized, have one sigma and two pi bonds, and are sometimes named for the simplest one, acetylene. For 10 points, name this functional group containing a carbon-carbon triple bond.
The copper-catalyzed reaction between an azide and this group is fundamental to click chemistry and is called the Huisgen cyclo-addition.
alkyne [accept acetylenes until mentioned]