title: Chloro Derivatives of Azafullerenes C59NCl5and Non-Classical C97NCl21.
abstract: High-temperature chlorination of HPLC fullerene fractions containing mainly C92/C94and C102/C104resulted in the isolation and X-ray structural characterization of chloro derivatives of azafullerenes, C59NCl5and 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 C59NCl5contains an isolated aromatic pyrrole ring on the fullerene cage and possesses C5vsymmetrical shape typical of other known C59NR5derivatives. The molecule of non-classical (NC) C97N(NC)Cl21contains an NC6heptagon on the azafullerene cage that assumes its formation by a C2loss 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.
authors.affiliation: Department of Chemistry, Moscow State University, 119991, Moscow, Leninskie gory, Russia.
authors.forename: Vitaliy Yu
authors.initials: VY
authors.lastname: Markov
authors.affiliation: Department of Chemistry, Moscow State University, 119991, Moscow, Leninskie gory, Russia.
authors.forename: Sergey I
authors.initials: SI
authors.lastname: Troyanov
keywords: addition pattern; azafullerenes; chlorination; non-classical azafullerene; structure elucidation