Octanuclear manganese(II,III) clusters stabilized with diamino-alcoxo ligands.
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.
Escuer
Albert
A
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
Vicente
Ramon
R
El Fallah
M Salah
MS
Sañudo
E Carolina
EC
Teat
Simon J
SJ
de Biani
Fabrizia Fabrizi
FF
Zanello
Piero
P