An alkyne is when you have at least two carbons triple bonded to each other. This last structure here is a special type of ring called a benzene ring. You'll learn more about that the further into organic chemistry you go. Now when it comes to carbonyl groups, remember: a carbonyl is...
Alkyne annulationTo achieve new reactivities of ubiquitous metals for the development of a sustainable society, the author investigated new reactions of organoiron species and developed an iron-catalyzed synthesis of naphthalene and phenanthrene derivatives....