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- W2098169133 abstract "Die beiden diastereomeren 4,7-Dimethoxy-12,15-dinitro[2.2]paracyclophane 3 und 4 wurden über die entsprechenden 2,11-Dithia[3.3]paracyclophane 9/10 und die davon abgeleiteten Disulfone 11/12 synthetisiert. Die Diastereomeren 3 und 4 ließen sich chromatographisch trennen und auf Grund der 1H-NMR-Daten zuordnen. — Obwohl die Donor-Akzeptor-Komponenten 1,4-Dimethyl-2,5-dinitrobenzol und 1,4-Dimethoxy-2,5-dimethylbenzol keine spektroskopisch nachweisbare Charge-Transfer(CT)-Komplexbildung zeigen, haben die entsprechenden Donor-Akzeptor-[2.2]Paracyclophane 3 und 4 starke CT-Absorptionen im Bereich zwischen 450 und 600 nm. Zwischen 3 und 4 bestehen beträchtliche Extinktionsunterschiede der CT-Banden, die auf die unterschiedliche Orientierung des Donor-Akzeptor-Systems zurückgeführt werden. Orientation Effects on Charge-Transfer Interactions, VIII. Diastereomeric 4,7-Dimethoxy-12,15-dinitro[2.2]paracyclophans The two diastereomeric 4,7-dimethoxy-12,15-dinitro[2.2]paracyclophanes 3 and 4 were synthesized via the corresponding 2,11-dithia[3.3]paracyclophanes 9/10 and the disulfones 11/12 derived therefrom. 3 and 4 were separated by chromatography and assigned on the basis of 1H NMR.— Although the donor-acceptor components 1,4-dimethyl-2,5-dinitrobenzene and 1,4-dimethoxy-2,5-dimethylbenzene do not show any charge-transfer(CT) complexation, the corresponding donor-acceptor [2.2]paracyclophanes 3 and 4 exhibit strong CT absorptions between 450 and 600 nm. There exist considerable differences in the intensity of the CT bands between 3 and 4, which are ascribed to the different orientations of the donor-acceptor system." @default.
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- W2098169133 title "Orientierungseffekte auf Charge‐Transfer‐Wechselwirkungen, VIII. Diastereomere 4,7‐Dimethoxy‐12,15‐dinitro[2.2]paracyclophane" @default.
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- W2098169133 doi "https://doi.org/10.1002/cber.19771101015" @default.
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