Synthesis, Structure, and Properties of Triple-Layered Naphthalenophane

Article abstract of DOI:10.1246/bcsj.62.164

The title compound was synthesized in a similar manner to a simple access to triple-layered <2.2><2.2>paracyclophane.Its structure was elucidated by X-ray crystallographic analysis.The outer naphthalene rings are bent into a boat form and the inner naphthalene ring is bent into a twist form.These naphthalenes are stacked in layers within van der Waals contact.Therefore, there is a strong transannular ?-electronic interaction between them, which brings about characteristic bathochromism, hyperchromism, and broadening in the electronic spectrum.These effects are more prominent than those of the double-layered homologue.