Isolable Triradical Trication of Hexaaza[1<sub>6</sub>]paracyclophane with Embedded 9,10-Anthrylenes: A Frustrated Three-Spin System
作者:Ryohei Kurata、Daisuke Sakamaki、Masashi Uebe、Mariko Kinoshita、Tetsuo Iwanaga、Takashi Matsumoto、Akihiro Ito
DOI:10.1021/acs.orglett.7b02088
日期:2017.8.18
macrocycle. The charge and spin distribution for one-electron and three-electron oxidation of the macrocycle was elucidated by means of electrochemical, spectroelectrochemical, EPR spectroscopic, and SQUID magnetometric methods. In particular, the triradical trication was successfully isolated as an air-stable salt, and moreover, its structure was disclosed by X-ray analysis. The triradical trication was characterized
制备了一种新的六氮杂[1 6 ]对环环烷烃衍生物,其中对苯撑被9,10-蒽交替取代,以研究其对整体π偶联以及大环构象变化的影响。通过电化学,光谱电化学,EPR光谱和SQUID磁力分析方法阐明了大环的单电子和三电子氧化的电荷和自旋分布。特别地,成功地分离出三价三阳离子为空气稳定的盐,并且通过X射线分析公开了其结构。三自由基三阳离子的特征是具有反铁磁交换相互作用的自旋受阻三自旋系统(J / k B ≃– 74 K)。