| 19 | Construction of highly antiaromatic boroles显示文摘Boroles are five-membered,unsaturated heterocycles with an antiaromatic 4π-electron BC_4 ring.According to Breslow's exten sion of the H(u|¨)ckel rule,the intrinsic antiaromaticity can be attrib uted to the unfavorableπ-electron delocalization of the BC_4 core,in which a vacant p-orbital on boron mediates the conjugation of four ringπ-electrons.The first borole derivative,1,2,3,4,5-pentaphenylborole[PhBC_4Ph_4],was isolated by Eisch and Hota[1]in 1969,but its crystal structure has been determined by X-ray crystallography recently[2].Since the structure of borole was confirmed。 | Weidong Zhang Bingjie Zhang Demei Yu Gang He | 2017 | Science Bulletin2017，62，13： | 0 |
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