Tetrathiafulvalene-[2.2]paracyclophanes: Synthesis, crystal structures, and chiroptical properties
Résumé
Two racemic tetrathiafulvalene-[2.2]paracyclophane electron donors EDT-TTF-[2.2]paracyclophane 1 and (COOMe) 2-TTF-[2.2]paracyclophane 2 have been synthesized via the phosphite mediated cross coupling strategy. Chiral HPLC allowed the optical resolution of the (R P) and (S P) enantiomers for both compounds. Solid-state structures of (R P)-1 and (rac)-2 have been determined by single crystal X-ray analysis. Intermolecular π-π and S•••S interactions are disclosed in the packing. Single crystal X-ray analysis of (R P)-1 combined with experimental and theoretical circular dichroism spectra allowed the assignment of the absolute configuration of the enantiomers of 1 and 2.
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