Cyclobutano[a]indene: a highly reactive strained olefin which plays a key trapping role in the photodecomposition of a polycyclic α-dione
Abstract
Cyclobutano[a]indene is characterised for the first time and shown to undergo a selection of cycloaddition reactions, including self-dimerisation to a [π2 +π2] dimmer whose structure has been confirmed by single crystal X-ray analysis.