Synthesis, crystal structures and magnetic properties of 2,3,6,7-tetrakis(2-cyanoethylthio)tetrathiafulvalene salts |
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Authors: | Jean Olivier Stphane Golhen Olivier Cador Lahcne Ouahab |
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Institution: | aOrganométalliques et matériaux moléculaires, UMR 6226 CNRS – Université Rennes-1, Sciences chimiques de Rennes, avenue du Général-Leclerc, 35042 Rennes cedex, France |
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Abstract: | The synthesis of the protected TTF tetrathiolate 2,3,6,7-tetrakis(2-cyanoethylthio)tetrathiafulvalene (TCE-TTF), as well as those of five new radical cation salts TCE-TTF](X), X− = PF6−, CF3SO3−, BF4−, obtained by electrocrystallization technique is presented. Five crystal structures of these materials based on their fully oxidized donor molecules are described. The flexibility of the cyanoethylene arm yields two conformations cis and trans to the molecule. Then compounds with PF6− and BF4− anions crystallized as two different phases. All these materials are insulators, and the magnetic studies of one phase of TCE-TTF](PF6) revealed an antiferromagnetic behavior. |
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Keywords: | Tetrathiafulvalene Radical cation salt MagnetismMots-clé s: Té trathiofulvalè ne Sel à radical cation Magné tisme |
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