Illustrated Glossary of Organic Chemistry

Pentene: A molecule having a five-carbon chain (or ring) and one alkene.








1-Pentene
A terminal monosubstituted alkene
  
(Z)-2-Pentene
Cis-2-Pentene
An internal disubstituted alkene
  
(E)-2-Pentene
Trans-2-Pentene
An internal disubstituted alkene
  
Cyclopentene
An internal disubstituted alkene