Preparation, properties, and X-ray structures of 5,5-bi(8-aminoquinoxalyl)s: novel Wurster-type electron donors with a heterobiaryl skeleton |
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Authors: | Takanori Suzuki Mayu Saito Hidetoshi Kawai Kenshu Fujiwara Takashi Tsuji |
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Affiliation: | Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan |
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Abstract: | The title electron donors were prepared by the double condensation reactions of 2,2′,3,3′-tetraamino-4,4′-bis(1-pyrrolidinyl)biphenyl with 1,2-diketones. They adopt twisted conformations in crystal, yet the reversible two-stage one-electron oxidation process suggests the planar geometries for the oxidized species. Depending on the nature of substituents on the pyrazine ring, this π-system can be endowed additional features such as chiroptical properties or metal coordination ability. |
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Keywords: | electron donor benzidine biquinoxalyl biaryl redox system through-bond interaction through-space interaction metal coordination |
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