Study of Molecular Complex Formation between [60]Fullerene and Two Series of Donors by the NMR Method

Formation of molecular complexes between [60]fullerene and (i) a series of aromatic hydrocarbons, namely, anthracene, acenaphthene, phenanthrene, pyrene, durene, pentamethylbenzene, and hexamethylbenzene, and (ii) a series of pyridines, namely, pyridine, 2-picoline, 3-picoline, 4-picoline, 2,6-lutidine, and 2,4,6-collidine has been studied in CCl 4 medium by NMR method. [60]Fullerene has been shown to form 1:1 molecular adducts with the above series of compounds. Formation constants ( K ) of the above complexes have been determined from the systematic variation of NMR chemical shifts of specific protons of the donors in the presence of C 60 . The K values of [60]fullerene complexes with pyridine, 3-picoline, and 4-picoline yield good estimates of the Hammett constant, ρ, for the complexation reaction.