2,4,6-Tris(4,5-diisopropyl-1,3-dithiol-2-ylidene)cyclohexane-1,3,5-trione: synthesis, X-ray crystal structure and amphoteric redox properties of a highly delocalised heterocyclic π-system

Abstract

The title compound 1 is synthesised by treatment of 1,3,5-trihydroxybenzene with 2-methylthio-4,5-di-n-propyl-1,3-dithiolium iodide in the presence of pyridine; the X-ray crystal structure of 1 reveals a highly delocalised π-system with strongly bonding intramolecular S ⋯ O interactions; four-stage, amphoteric redox behaviour is observed by cyclic voltammetry.