Stable 4n pi electron triplet molecules

Abstract

Cyclic 4n pi electron conjugated systems with C3 or greater symmetry can have triplet ground states. If stable examples of such systems can be prepared they can serve as the most important components of ferromagnetic organic compounds, a hitherto unknown class of substances. The theory of how triplets can be used to prepare ferromagnets is outlined. Synthetic approaches to stable triplets, and to the ferromagnetic systems themselves, are also described. © 1982 IUPAC