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