title: Paddlewheel dirhodium complexes bridged by para-substituted benzoates.
abstract: The dirhodium complex bis(benzonitrile)tetrakis[mu-4-(diethylamino)benzoato-kappa2O:O']dirhodium(II)(Rh-Rh) benzonitrile disolvate, [Rh2(C11H14NO2)4(C7H5N)2].2C7H5N, lies about an inversion centre. The dirhodium complex (methanol)tetrakis(mu-4-nitrobenzoato-kappa2O:O')(pyridine)dirhodium(II)(Rh-Rh) dichloromethane solvate, [Rh2(C7H4NO4)4(C5H5N)(CH4O)].CH2Cl2, lies in a general position in the unit cell, but the complexes dimerize around an inversion centre via O-H...O hydrogen bonding of the axial MeOH to a carboxylate O atom. In the latter crystal structure, pi-pi stacking interactions between the bridging 4-nitrobenzoate ligands and the axial pyridine ligand are observed between adjacent molecules.
authors.affiliation: Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan. ebihara@apchem.gifu-u.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ebihara
authors.forename: Kaori
authors.initials: K
authors.lastname: Yamada
authors.forename: Takashi
authors.initials: T
authors.lastname: Kawamura