桶烯（Barrelene）是一个双环烯烃类有机化合物。其化学式为C₈H₈，系统命名为双环[2.2.2]-2,5,7-辛三烯。桶烯因含有三个互相平行的双键，外观如三个乙烯分子箍成的桶状而得名。

首次被化学家H. E. Zimmerman于1960年用苯和乙炔，通过狄尔斯-阿尔德反应合成。其化学性质类似其他多烯烃。

桶烯的6个p轨域示意图

计算化学界对桶烯做了深入研究。它含有6个环状排列但不平面重叠的p轨域原子轨道，其所构成的3个π键电子云必须有一对处于反符号重叠的状态，类似莫比乌斯带的结构。此被称为莫比乌斯芳香性。

Barrelene is a bicyclic organic compound with chemical formula C₈H₈ and systematic name bicyclo[2.2.2]octa-2,5,7-triene. First synthesized and described by H. E. Zimmerman in 1960 the name derives from the obvious resemblance to a barrel, with the staves being three ethylene units attached to two methine groups. It is the formal Diels-Alder adduct of benzene and acetylene. Due to its unusual molecular geometry the compound is of considerable interest to theoretical chemists. Like benzene, barrelene has a set of 6 cyclic, but not planar, overlapping p-orbitals. Because of overlap of opposite-sign lobes, the structure represents Möbius aromaticity.