Maiti Avijit, Zhang Fangyuan, Krummenacher Ivo, Bhattacharyya Moulika, Mehta Sakshi, Moos Michael, Lambert Christoph, Engels Bernd, Mondal Abhishake, Braunschweig Holger, Ravat Prince, Jana Anukul
Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, India.
Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany.
J Am Chem Soc. 2021 Mar 17;143(10):3687-3692. doi: 10.1021/jacs.0c12624. Epub 2021 Mar 2.
Herein we report the synthesis and characterization of anionic boron- and carbon-based Kekulé diradicaloids spanned by a -phenylene bridge. In contrast to Thiele's hydrocarbon, a closed-shell singlet system, they show an appreciable population of the triplet state at room temperature, as evidenced by both NMR and EPR spectroscopy. Moreover, en route to these anionic boron- and carbon-based hetero-diradicaloids, the formation of an isolable diamino(4-diarylboryl-phenyl)methyl radical was observed.
在此，我们报告了由亚苯基桥连接的阴离子型硼基和碳基凯库勒双自由基类化合物的合成与表征。与闭壳单重态体系的蒂勒烃不同，它们在室温下三重态有可观的占比，这通过核磁共振（NMR）和电子顺磁共振（EPR）光谱得以证实。此外，在合成这些阴离子型硼基和碳基杂双自由基类化合物的过程中，观察到了一种可分离的二氨基（4 - 二芳基硼基 - 苯基）甲基自由基的形成。
