Isolable Bis-BN-Based Analogues of Müller's Hydrocarbon  

作　　者：Sha Xu Zhuofeng Xie Yuyang Dai Xiaona Liu Qidi Bao Chunmeng Liu Yuanting Su 

机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu,215123 China [2]School of Radiation Medicine and Protection,Soochow University,Suzhou,Jiangsu,215123 China

出　　处：《Chinese Journal of Chemistry》2023年第23期3211-3215,共5页中国化学（英文版）

基　　金：financial support from the National Natural Science Foundation of China(22001184,Y.S.,11904425,C.L.);Natural Science Foundation of Jiangsu Province(BK20200849,Y.S.);Natural Science Foundation of Jiangsu Higher Education Institutions of China(20KJB150002,Y.S.);Entrepreneurship and Innovation Talent Program of Jiangsu Province(JSSCBS20210664,C.L.).

摘　　要：Müller's hydrocarbon and its analogues are classical examples of Kekulé diradicaloids and have gained great attention.However,because of their high reactivities,their isolation and structural characterizations are still challenging.Herein,we report the isolation of two bis-BN-based analogues of Müller's hydrocarbon (1 and 2) as crystalline solids in moderate yields.Experimental results and theoretical studies demonstrated that compound 1 possessing the terminal 1,3,2-diazaboryl groups is an open-shell singlet diradicaloid,which is in contrast to the closed-shell singlet ground states of the bis-BN-based analogues of Thiele's and Chichibabin's hydrocarbons with the same terminal groups,illustrating the strong influence of the central linkers on the ground state.Additionally,the replacement of the terminal 1,3,2-diazaboryl groups in 1 with the bis(2,4,6-triisopropylphenyl)boryl groups affords 2 with higher diradical character and a smaller singlet-triplet energy gap.

关 键 词：RADICALS Müller's hydrocarbon Boron Structure elucidation Electronic structure 

分 类 号：O62[理学—有机化学]