Antiaromaticity

Antiaromaticity is a property of cyclic molecules with [4n] π electrons, leading to higher energy and decreased stability. In contrast to aromatic compounds, antiaromatic compounds are highly unstable and reactive, often exhibiting non-planarity to reduce π interactions. This results in a diamagnetic ring current for aromatics and a paramagnetic ring current for antiaromatics, detectable by NMR spectroscopy.