Annelie Döhling

Syntheses of a fourfold-bridged porphyrin-quinone cyclophane and its zinc complex

Abstract Porphyrin-quinone cyclophane 1 , in which a tetraphenylporphyrin is linked to a benzoquinone unit by four tetramethylene chains in a face-to-face orientation, was prepared in a multistep synthesis. The structure of 1 and its zinc complex 10 are discussed based on 1 H-NMR and in view of photoinduced electron-transfer reactions.

Electron donor-acceptor [3.3]metacyclophanes : charge-transfer absorption of syn-and anti-isomers

Abstract As electron donor-acceptor [3.3]metacyclophanes with dicyanoquinomethane as acceptor unit in different sterical arrangements the syn- anti isomers 3 and 4 were synthesized. Charge-transfer interactions are discussed with reference to the isomerization of 4 and 3 and to the absorption spectra.

Anti-[3.3]metacyclophane quinhydrones: synthesis, charge-transfer absorption and thermal rearrangement to syn-stereoisomers☆

Abstract The synthesis of anti -[3.3]metacyclophane quinhydrones and their thermal rearrangement to syn -stereoisomers are described. Charge-transfer absorptions are discussed under the aspect of different donor-acceptor orientations.

[3.3] metacyclophane quinhydrones

Zusammenfassung Via the stabled stereoisomers 1 and 2 of 6,9,15,18-tetramethoxy[3.3]metacyclophane, demethylation and oxidation, intramolecular quinhydrones of the [3.3]metacyclophane series were obtained the charge-transfer absorption of which is discussed.