Synthesis and intramolecular electronic interactions of hexaarylbenzene bearing redox-active Cp*(dppe)Fe-C≡C- termini

Publication date: Available online 6 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Yuya Tanaka, Munetaka AkitaAbstractHexaphenyl(1) and hexathienyl-benzene (2) complexes with the six redox-active Cp*(dppe)Fe-C≡C- units are synthesized and their properties in terms of molecular junction are investigated. Both complexes show stepwise multi-redox processes and IVCT bands in the NIR region upon progressive oxidation from the neutral to hexacationic state, as a result of intramolecular electron transfer processes via troidal conjugation through the peripheral aromatic rings. Judging from the KC and Vab values obtained by deconvolution analysis, electronic interaction for thienylene derivative 2 turns out to be stronger than that for the phenylene complex 1. DFT analysis of model complexes support superio'r electron transfer properties for the thienyl derivatives.Graphical abstract

Source: Journal of Organometallic Chemistry - October 7, 2018 Category: Chemistry Source Type: research