... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > acetylenic compound > terminal acetylenic compound > acetylene

... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > acetylenic compound > terminal acetylenic compound > acetylene

chemical entity > molecular entity > main group molecular entity > gas molecular entity > acetylene

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic fundamental parent > hydrocarbon > acetylenes > acyclic acetylene > alkyne > acetylene

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > hydrides > organic hydride > organic fundamental parent > hydrocarbon > acetylenes > acyclic acetylene > alkyne > acetylene

... > chemical entity > molecular entity > main group molecular entity > s-block molecular entity > hydrogen molecular entity > hydrides > organic hydride > organic fundamental parent > hydrocarbon > acetylenes > acyclic acetylene > alkyne > acetylene

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > acetylenic compound > acetylenes > acyclic acetylene > alkyne > acetylene

... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > acetylenic compound > acetylenes > acyclic acetylene > alkyne > acetylene