SYNTHESIS AND STRUCTURE OF SUPERSTRUCTURAL COORDINATION COMPLEXES OF FULLERENE C₆₀ WITH IRON AND NIKEL ATOMS

R.O. Kochkanyan, M.M. Nechitaylov, A.N. Zaritovskiy

L. M. Litvinenko Institute of Physical Organic and Coal Chemistry of the National Academy of Sciences of Ukraine, 70 R.Luxemburg Str., Donetsk, 83114, Ukraine; e-mail: mm_nech@mail.ru

Iron- and nickel-containing exohedral metallofullerenes, and earlier unknown heterobimetallic(Fe,Ni) metallofullerenes containing from 0.8 to 11.8 metal atoms per C₆₀, have been obtained in a molten AlCl₃/NaCl mixture by fullerene C₆₀ interaction with iron and nickel halogenides, and zero-valent iron and nickel. Iron and nickel atoms form π-complexes with pentagonal faces of C₆₀ polyhedrons; a crystal structure of heterobimetallic metallofullerenes has a hexagonal elementary cell. While metallofullerenes are isolated from a reaction mixture, partial hydrogenation and hydroxylation of a fullerene carbon cage take place, as well as intercalation of small molecules and ions (H₂O, H⁺, Cl^-) into interfullerene cavities.

Key words: fullerenes, metallofullerenes, organo-metallic compounds, π-complexes of iron and nickel, coordination compounds.

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