三嗪封端六氮杂卟啉的酸碱控制的多重构象和芳香性开关。
Acid-base controlled multiple conformation and aromaticity switches in tren-capped hexaphyrins.
机构信息
Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
出版信息
Org Biomol Chem. 2019 Apr 10;17(15):3718-3722. doi: 10.1039/c9ob00489k.
PMID:30896705
Abstract
Upon protonation, a tren-capped hexaphyrin undergoes successive rectangular-to-Möbius and Möbius-to-triangular conformational isomerizations, with concomitant antiaromaticity-to-aromaticity reversal. This affords different cage environments leading ultimately to a "crypto-bowl-shape" hexaphyrin hosting a trifluoroacetate counterion.
摘要
质子化后，三嗪封端的六吡咯啉发生连续的矩形到莫比乌斯和莫比乌斯到三角形构象异构化，同时伴随着反芳香性到芳香性的反转。这提供了不同的笼状环境，最终导致“隐碗状”六吡咯啉容纳三氟乙酸根负离子。
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