Abstract
Control of the structural type in metallic enantiopure and racemic radical cation salts is achieved through hydrogen bonding interactions between the chiral donor DM-EDT-TTF and the XF6 anions (X = P, As, Sb), determined by the anion size and the chiral information.
Highlights
Control of the structural type in metallic enantiopure and racemic radical cation salts is achieved through hydrogen bonding interactions between the chiral donor DM-EDT-TTF and the XF6 anions (X = P, As, Sb), determined by the anion size and the chiral information
In this respect we have recently described the complete series of radical cation salts (DM-EDT-TTF)2PF6 for which the enantiopure compounds crystallized in the monoclinic space group P21 with four independent donor molecules and two anions in the unit cell, while the racemic salt crystallized in the triclinic centrosymmetric space group P1% with one independent donor in the asymmetric unit and the anion located on an inversion centre.[20]
An interesting feature of these salts concerns the templating role of the PF6À anion through the establishment of C–HÁ Á ÁF hydrogen bonding, leading to packings where donor layers are interconnected via the anions, all the fluorine atoms being involved in hydrogen bonding with either vinyl CQCH, methyne CHMe or methyl protons
Summary
Control of the structural type in metallic enantiopure and racemic radical cation salts is achieved through hydrogen bonding interactions between the chiral donor DM-EDT-TTF and the XF6 anions (X = P, As, Sb), determined by the anion size and the chiral information.
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