title: Hoop-Shaped Condensed Aromatic Systems: Synthesis and Structure of Iron- and Ruthenium-Hepta(organo)[60]fullerene Complexes.
abstract: Potassium reduction of iron- and ruthenium-penta(organo)[60]fullerene complexes, [M(eta(5)-C60R5)(eta(5)-Cp)] (1 a: M = Fe, R = Ph; 1 b: M = Fe, R = Me; 1 c: M = Ru, R = Ph; 1 d: M = Ru, R = Me; Cp = C5H5) gave mono- and dianions of these complexes. Treatment of the dianion 1 a with alpha-bromodiphenylmethane gave three different iron-hepta(organo)[60]fullerenes, [Fe{eta(5)-C60Ph5(CHPh2)2}(eta(5)-Cp)], as a mixture of regioisomers. All three compounds were fully characterized by physical methods, including X-ray crystallography and electrochemical measurements. One of the three compounds contains a new hoop-shaped condensed aromatic system.
authors.affiliation: Nakamura Functional Carbon Cluster Project, ERATO, Japan Science and Technology Agency, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Takeshi
authors.initials: T
authors.lastname: Fujita
authors.forename: Eiichi
authors.initials: E
authors.lastname: Nakamura