Crystal structure of bis(ethylenedithio)tetrathiafulvalenium μ 2 -acetato-bis[tribromidorhenate(III)] 1,1,2-trichloroethane hemisolvate

• Published in: Acta crystallographica. Section E, Crystallographic communications Vol. 72; no. 5; pp. 712 - 715
• Main Authors: Golichenko, Alexander A., Kravchenko, Andrey V., Omelchenko, Irina V., Chudak, Denis M., Starodub, Vladimir A., Barszcz, Boleslaw, Shtemenko, Alexander V.
• Format: Journal Article
• Language: English
• Published: 01.05.2016
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989016006058

The asymmetric unit of the title salt, (C 10 H 8 S 8 )[Re 2 Br 6 (CH 3 COO)]·0.5C 2 H 3 Cl 3 , contains one bis(ethylenedithio)tetrathiafulvalene (ET) radical cation, one μ 2 -acetato-bis[tribromidorhenate(III)] anion and a 1,1,2-trichloroethane molecule with half-occupancy disordered about a twofold rotation axis. The tetrathiafulvalene fragment adopts an almost planar configuration typical of the ET radical cation. The C atoms of both ethylenedithio fragments in the cation are disordered over two orientations with occupancy factors 0.65:0.35 and 0.77:0.23. In the anion, six Br atoms and a μ 2 -acetate ligand form a strongly distorted cubic O 2 Br 6 coordination polyhedron around the Re 2 dinuclear centre. In the crystal, centrosymmetrically related ET cations and Re 2 O 2 Br 6 anions are linked into dimers by π–π stacking interactions [centroid-to-centroid distance = 3.826 (8) Å] and by pairs of additional Re...Br contacts [3.131 (3) Å], respectively. The dimers are further packed into a three-dimensional network by non-directional interionic electrostatic forces and by C—H...Br and C—H...S hydrogen bonds. The disordered 1,1,2-trichloroethane molecules occupy solvent-accessible channels along the b axis.