title: Octanuclear manganese(II,III) clusters stabilized with diamino-alcoxo ligands.
abstract: The employment of the 1,3-bis(dimethylamino)-2-propanolate (bdmap) ligand as a chelating/bridging ligand in manganese chemistry is described. The reaction of Mn(R-BzO)(2) and bdmap affords [Mn(8)(O)(4)(R-BzO)(12)(bdmap)(2)(H(2)O)(2)], R = H (1), R = 3-Cl (2) and R = 4-Cl (3), which are mixed-valence Mn(II)(2)Mn(III)(6) clusters. Structural characterization was achieved for 1 and 2, which can be described as a central double defective dicubane Mn(III)(4) subunit, capped by two oxo-bridged Mn(II)-mu(bdmap)-Mn(III) dinuclear units. DC variable-temperature magnetic susceptibility studies were carried out in the 2-300 K range, revealing an overall antiferromagnetic behaviour for 1-3. This work demonstrates for the first time the ability of this kind of polytopic ligands in high nuclearity manganese chemistry.
authors.affiliation: Departament de Química Inorgànica and Institut de Nanociencia i Nanotecnologia de la Universitat de Barcelona (IN2UB), Martí Franqués 1-11, 08028, Barcelona, Spain. albert.escuer@qi.ub.es
authors.forename: Albert
authors.initials: A
authors.lastname: Escuer
authors.forename: Ramon
authors.initials: R
authors.lastname: Vicente
authors.forename: M Salah
authors.initials: MS
authors.lastname: El Fallah
authors.forename: E Carolina
authors.initials: EC
authors.lastname: Sañudo
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Teat
authors.forename: Fabrizia Fabrizi
authors.initials: FF
authors.lastname: de Biani
authors.forename: Piero
authors.initials: P
authors.lastname: Zanello