Cyanide-bridged Fe(III)-Mn(III) bimetallic systems assembled from the fac-Fe tricyanide and Mn Schiff bases: structures, magnetic properties, and density functional theory calculations.

Reaction of [(Tp)Fe(CN)3]− [Tp = hydrotris(pyrazolyl)borate] with respective Mn(III) Schiff bases led to the formation of four dimeric molecules, [(Tp)Fe(CN)3][Mn(1-napen)(H2O)]·MeCN·4H2O [1; 1-napen = N,N′-ethylenebis(2-hydroxy-1-naphthylideneiminato) dianion], [(Tp)Fe(CN)3][Mn(5-Clsalen)(H2O)] [2; 5-Clsalcy = N,N′-(trans-1,2-cyclohexanediylethylene)bis(5-chlorosalicylideneiminato) dianion], [(Tp)Fe(CN)3][Mn(2-acnapen)(MeOH)]·MeOH [3; 2-acnapen = N,N′-ethylenebis(1-hydroxy-2-acetonaphthylideneiminato) dianion], [(Tp)Fe(CN)3][Mn(3-MeOsalen)(H2O)] [4; 3-MeOsalen = N,N′-ethylenebis(3-methoxysalicylideneiminato) dianion], and a one-dimensional (1D) zigzag chain [(Tp)Fe(CN)3][Mn(2-acnapen)]·H2O (5). The dimers contain multiple intermolecular interactions such as hydrogen bonds, face-to-face π−π contacts, and edge-to-face CH−π forces, raising molecular dimensions from one-dimensional (1D) up to three-dimensional (3D) arrays, whereas there are no π−π stacking interactions in the 1D chain compound. Magnetic meas...