6,6′-Biindeno[1,2-b]fluorene: an open-shell indenofluorene dimer

Abstract

Nakano et al. reported that the antiaromatic indenofluorene (IF) isomers are diradicaloid molecules having varying degrees of open-shell character, with indeno[1,2-b]fluorene displaying a weaker diradical character index (y0 = 0.072)....