Chloro Derivatives of Azafullerenes C₅₉NCl₅ and Non-Classical C₉₇NCl₂₁

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• 作者：Dr. Vitaliy Yu. Markov and Prof. Dr. Sergey I. Troyanov
• 刊名：Chemistry – An Asian Journal
• 出版年：2017
• 出版时间：February 1, 2017
• 年：2017
• 卷：12
• 期：3
• 页码：298-301
• 全文大小：938K
• ISSN：1861-471X

文摘

High-temperature chlorination of HPLC fullerene fractions containing mainly C₉₂/C₉₄ and C₁₀₂/C₁₀₄ resulted in the isolation and X-ray structural characterization of chloro derivatives of azafullerenes, C₅₉NCl₅ and C₉₇NCl₂₁. It was assumed that formation of azafullerenes in the arc-discharge synthesis of fullerenes occurred due to air leakage into the reactor. The molecule of C₅₉NCl₅ contains an isolated aromatic pyrrole ring on the fullerene cage and possesses C_5v symmetrical shape typical of other known C₅₉NR₅ derivatives. The molecule of non-classical (NC) C₉₇N(NC)Cl₂₁ contains an NC₆ heptagon on the azafullerene cage that assumes its formation by a C₂ loss from C₉₉N in the course of chlorination. The chlorination pattern is characterized by the presence of stabilizing isolated aromatic systems and isolated double C=C bonds on the C₉₇N(NC) azafullerene cage.