Illustrated Glossary of Organic Chemistry

Butyne: Any isomer of molecular formula C4H6 containing an alkyne.



Kekule structure
   
Ball and spoke
   
Space-filling model
Molecular structure of 1-butyne (also called ethylacetylene), a terminal alkyne.



Kekule structure
   
Ball and spoke
   
Space-filling model
Molecular structure of 2-butyne (also called dimethylacetylene), an internal alkyne.