Novel monomeric, oligomeric, and polymeric charge‐transfer complexes with interesting electrical conductivity properties and even exhibiting superconductivity are expected to be obtainable by the systematic chemical modification of extended tetrathiafulvalenes (see Figure for one example). The synthesis and cyclic voltammetric characterization of such extended donors are reviewed in detail. magnified image

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The Organotin(IV) Coordination Polymer (( ß38 )4 ß(€ )6•2 2 •€4 802)": A Three-Dimensional Host-Guest Network Involving "Cascade-Type" Guests Macroor polycyclic Lewis base receptors1 require an appropriate disposition of Lewis acidic centers over the respective organic rings. Frequently, after the anchoring of at least two metal ions to selected N and/or 0 atoms of the ring as "primary guests",

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A homologous series of oligo(9,lO-anthry1ene)s up to the heptamer have been synthesized by reductive coupling of quinones with lithioanthrylenes, followed by reductive aromatization of the intermediate hydroxy species. The method used allows the introduction of different alkyl substituents, which ensure sufficient solubility of the newly synthesized anthrylene systems in common organic solvents. The solidstate conformations of trimers 4 and 5 have been established by X-ray structure analysis; UV/Vis-spectroscopic investiga-tions in solution reveal the anthratene moieties in 9,lO-anthrylenes to exist as electronically independent electrophores. The trianthrylenes can b e subjected to electrophilic substitution which regioselectively provides e.g. 10-bromo-and 10,lO"-dibromo derivatives. These bromides can easily b e converted into the corresponding cyano compounds. Under the influence of potassium hydroxide in quinoline the trimer 5 partially cyclizes to helianthrene compounds.