alkynes
Synonyms
Examples
The addition of water to alkynes is a related reaction except the initial enol intermediate converts to the ketone or aldehyde.
Correspondingly, cyclic alkynes are rare.
Depending on catalysts and conditions, alkynes add one or two equivalents of hydrogen.
Diels–Alder reactions of alkynes with pyrone or cyclopentadienone with expulsion of carbon dioxide or carbon monoxide also form arene compounds.
Terminal alkynes have the formula RC 2 H. An example is methylacetylene (propyne using IUPAC nomenclature).
Terminal and internal alkynes Internal alkynes feature carbon substituents on each acetylenic carbon.