Abstract
Electrocrystallization of the (S,S,S,S) enantiomer of tetramethyl-bis(ethylenedithio)-tetrathiafulvalene donor 1 in the presence of the dianionic hexanuclear rhenium (III) cluster [Re6S6Cl8]2− affords a crystalline radical cation salt formulated as [(S)-1]2·Re6S6Cl8, in which the methyl substituents of the donors adopt an unprecedented all-axial conformation. A complex set of intermolecular TTF···TTF and cluster···TTF interactions sustain an original tridimensional architecture.
Highlights
IntroductionIn principle several stereoisomers, yet the only ones which have been properly described are the (S,S,S,S)
IntroductionTetramethyl-bis(ethylenedithio)-tetrathiafulvalene 1 (TM-BEDT-TTF)has inhas principle several possibleTetramethyl-bis(ethylenedithio)-tetrathiafulvalene 1 (TM-BEDT-TTF)in principle several stereoisomers, yet the only ones which have been properly described are the (S,S,S,S) (Figure1) and possible stereoisomers, yet the only ones which have been properly described are the (S,S,S,S) 1) (R,R,R,R)enantiomers [1,2,3], abbreviated (S)-1 and (R)-1, respectively
Donor an important contacts between the donors, and, the transport properties. It has been shown by issue iscalculations the conformation adopted byphase the methyl substituents of the dithiin rings, as more this strongly theoretical that in the gas the all-axial conformation is slightly stable than influences the packing and intermolecular contacts between the donors, and, the the all-equatorial one, both being in equilibrium in solution [1] (Figure 1)
Summary
In principle several stereoisomers, yet the only ones which have been properly described are the (S,S,S,S). Regarding the enantiopure donor 1 in anDM-EDT-TTF important issue theOther conformation based conductors [13,14],TM-BEDT-TTF or the different packings salts is [15]. TM-BEDT-TTF donor an important contacts between the donors, and, the transport properties It has been shown by issue iscalculations the conformation adopted byphase the methyl substituents of the dithiin rings, as more this strongly theoretical that in the gas the all-axial conformation is slightly stable than influences the packing and intermolecular contacts between the donors, and, the the all-equatorial one, both being in equilibrium in solution [1] (Figure 1). The counterion is the the first crystalline enantiopure radical cation salt of TM-BEDT-TTF in which the oxidized dianionic hexanuclear rhenium cluster [Re6 S6 Cl8 ]2 ́ [26] which provided several series of TTF based donor adopts a (ax,ax,ax,ax) conformation. Cluster [Re6S6Cl8] [26] which provided several series of TTF based radical cation salts [27,28,29,30], but has never been used with a chiral donor to the best of our knowledge
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