title: Trans-fused macrobicycle "betweenanene" around a planar Cu2(mu-CH3O)2 core showing remarkable antiferromagnetic interaction.
abstract: Complexation of 4,6-bis{3-(2-pyridyl)-1H-pyrazol-1-yl}pyrimidine (bppp) and copper(II) tetrafluoroborate in methanol gave a self-assembled [Cu2(CH3O)2(bppp)2]2+ ion having a betweenanene-type structure. Each bppp spans across the common Cu2O2 plane in a trans fashion to ligate each copper center. The antiferromagnetic interaction observed in the Cu2O2 core is ascribable to the superexchange along the Cu-O-Cu linkage and found to be one of the largest among the analogous compounds, owing to the large Cu-O-Cu angle perturbed with the two bppp molecular tweezers.
authors.affiliation: Department of Applied Physics and Chemistry, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan. ishi@pc.uec.ac.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ishida
authors.forename: Kenji
authors.initials: K
authors.lastname: Yanagi
authors.forename: Takashi
authors.initials: T
authors.lastname: Nogami