Illustrated Glossary of Organic Chemistry

Cyclobutadiene (1,3-cyclobutadiene): An antiaromatic hydrocarbon of molecular formula C4H4, or a molecule containing this moiety.

Molecular Structure of 1,3-Cyclobutadiene









Kekule structure
   
Bond-line structure
   
Ball and spoke model
   
Space-filling model
   
Molecular model kit