In the Fritsch-Buttenburg-Wiechell rearrangement, one of these is synthesized from a vinyl bromide.
In the Fritsch-Buttenburg-Wiechell rearrangement, one of these is synthesized from a vinyl bromide. Cadiot-Chodkiewicz coupling results in a molecule with two of these functional groups. Addition of water to these compounds in the presence of sulfuric acid results in the formation of an enol, while catalytic hydrogenation with Lindlar's catalyst stereoselectively forms a syn product. Their functional carbon atoms are sp hybridized. They are inherently unstable, and terminal ones can be deprotonated to yield acetylide ions. For 10 points, identify these hydrocarbons with at least one triple carbon-carbon bond, the simplest example of which is ethyne. 
In the Fritsch-Buttenburg-Wiechell rearrangement, one of these is synthesized from a vinyl bromide.
alkynes