title: Cis- and trans-bis(2-cyanoethylsulfanyl)(decane-1,10-diyldithio)tetrathiafulvalene.
abstract: The isomeric title compounds, 2,7-bis(2-cyanoethylsulfanyl)-3,6-(decane-1,10-diyldithio)tetrathiafulvalene and 2,6-bis(2-cyanoethylsulfanyl)-3,7-(decane-1,10-diyldithio)tetrathiafulvalene, both C22H28N2S8, comprise bis(2-cyanoethylsulfanyl)tetrathiafulvalene units tethered by a saturated decamethylenedithio linker attached in either a cis or a trans manner. The tetrathiafulvalene (TTF) group is planar in the cis isomer, but distorted significantly from planarity and twisted about its long axis in the trans isomer. In both structures, intermolecular interactions are segregated into regions in which TTF units are brought into close contact and regions where the polymethylene chains are brought into close contact. In the cis isomer, TTF units exhibit pi-pi stacking interactions, while in the trans isomer they do not.
authors.affiliation: Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
authors.forename: Sune
authors.initials: S
authors.lastname: Nygaard
authors.forename: Amar H
authors.initials: AH
authors.lastname: Flood
authors.forename: Jan O
authors.initials: JO
authors.lastname: Jeppesen
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Bond