Cover Feature: Hydration of Polycationic [5]Radialene with Quintuple 1,3‐Dithiol‐2‐ylidenes Leads to a New Class of π‐Extended Tetrathiafulvalene Scaffold (Chem. Eur. J. 19/2019)

Abstract

Hydration reaction of tetracationic salt of [5]radialene bearing quintuple 4,5‐benzo‐1,3‐dithiol‐2‐ylidenes provided some unforeseen oxygen adducts: a transannular dicationic salt linked by oxygen atom; a tetrathiafulvalene vinylogue with 1,4‐dithiine‐2(3H)‐one moieties; and a π‐extended tetrathiafulvalene with cyclopentenone core. The nucleophilic addition of H2O to [5]radialene depends on the structural feature of the π‐conjugated polycationic [5]radialene scaffold. More information can be found in the Full Paper by T. Shirahata, Y. Misaki, et al. on page 4984.