title: Regioselective synthesis of chiral dimethyl-bis(ethylenedithio)tetrathiafulvalene sulfones.
abstract: Enantiopure (R,R) and (S,S)-dimethyl-bis(ethylenedithio)tetrathiafulvalene monosulfones have been synthesized by the aerial oxidation of the chiral dithiolates generated from the propionitrile-protected precursors. Both enantiomers crystallize in the orthorhombic chiral space group P212121. They show a boat-type conformation of the TTF moiety, a rather rigid dithiin sulfone ring and the methyl groups in a bisequatorial conformation. Cyclic voltammetry measurements indicate fully reversible oxidation in radical cation and dication species.
authors.affiliation: Université d'Angers, CNRS, Laboratoire MOLTECH-Anjou, UMR 6200, UFR Sciences, Bât. K, 2 Bd. Lavoisier, 49045 Angers, France.
authors.forename: Flavia
authors.initials: F
authors.lastname: Pop
authors.affiliation: Université d'Angers, CNRS, Laboratoire MOLTECH-Anjou, UMR 6200, UFR Sciences, Bât. K, 2 Bd. Lavoisier, 49045 Angers, France.
authors.forename: Narcis
authors.initials: N
authors.lastname: Avarvari
keywords: chirality; crystal structures; molecular materials; sulfones; tetrathiafulvalenes