Octazethrene and Its Isomer with Different Diradical Characters and Chemical Reactivity: The Role of the Bridge Structure
作者:Pan Hu、Sangsu Lee、Kyu Hyung Park、Soumyajit Das、Tun Seng Herng、Théo P. Gonçalves、Kuo-Wei Huang、Jun Ding、Dongho Kim、Jishan Wu
DOI:10.1021/acs.joc.6b00172
日期:2016.4.1
The fundamental relationship between structure and diradical character is important for the development of open-shell diradicaloid-based materials. In this work, we synthesized two structural isomers bearing a 2,6-naphthoquinodimethane or a 1,5-naphthoquinodimethane bridge and demonstrated that their diradical characters and chemical reactivity are quite different. The mesityl-or pentafluorophenyl-substituted
结构和双基特征之间的基本关系对于开壳双基基材料的开发很重要。在这项工作中,我们合成了带有2,6-萘醌二甲烷或1,5-萘醌二甲烷桥的两个结构异构体,并证明了它们的双自由基特性和化学反应性完全不同。由分子结构Friedel-Crafts烷基化,然后通过氧化脱氢策略,从关键结构单元4和11合成间苯三酚或五氟苯基取代的八氮杂蒽衍生物OZ-M / OZ-F及其异构体OZI-M(具有苯甲酰基取代基)。。我们的详细的实验和理论研究表明,两种异构体具有一个开壳层单重基态具有显着双基字符(Ý 0 = 0.35和0.34 OZ-M和OZ-F ,和ÿ 0 = 0.58 OZI-M )。化合物OZ-M和OZ-F在周围环境中具有良好的稳定性,而OZI-M具有高反应性并且可以容易地氧化成二氧羰基产物15,这可以与它们的不同的双自由基特性相关。此外,我们研究了OZ-M,OZ-F和15的物理性质。