Cobalt(III) Schiff-base cyanido complex usable as a ligand in preparation of heterobimetallic Co(III)–Fe(III) building blocks

Field-induced slow relaxation of magnetization in dinuclear and trinuclear CoIII⋯MnIII complexes

“…The crystal structures of 1 and 2 are isostructural, crystallizing in monoclinic space group P2 1 (Table 1) and they are also isostructural with the previously reported compound [Co(3EtO-L5)(m-CN)Fe(L4a)Cl]. 9 The crystal structures of 1 and 2 consist of dinuclear [Co(3EtO-L5)(m-CN)Mn(L4a)X] (X ¼ Cl, and Br, respectively) molecules in which the metal atoms are bridged by the cyanido ligand (Co-CN-Mn linkage, Fig. 1).…”

“…Compounds 1, 2 and 3 were prepared in a similar way. The [Co(3EtO-L5)(CN)] precursor complex 9 was mixed with the corresponding [Mn(L4a)X] or [Mn(L4a)(H 2 O)]I compounds (X ¼ Cl À in 1, Br À in 2) in methanol and they were stirred under heating for 15 minutes. The solution was ltered to a beaker and le to cool down.…”

“…This was most probably caused by a rather long N CN -Fe-Cl axial formed by bond lengths Fe-N CN ¼ 2.236(2) and Fe-Cl ¼ 2.4075(7) Å (N CN ¼ the cyanido nitrogen atom). 9 Inspired by these ndings we attempted to prepare the Mn III analogues of the aforementioned compounds, which should possess large uniaxial magnetic anisotropy accentuated by the expected axially elongated tetragonal bipyramidal coordination polyhedron of the Mn III atom. Furthermore, in order to analyse the inuence of the halido ligand exchange on magnetic properties, we tried to prepare a series of CoMnX compounds (with X ¼ F À , Cl À , Br À , I À ).…”

Structural, Magnetic, and Electrochemical Characterization of Iron(III) and Cobalt Complexes with Penta‐N3O2‐dentate Ligands

“…Furthermore, the redox properties of only a few complexes with L R1R2 have been reported yet. [27,[30][31][32][33]43,44] Herein we report a series of six new [Fe(L Br,Cl )X] (X: Cl À , N 3 À , NCO À , NCS À , NCSe À , NC À ) complexes. In extension to the previously reported complexes [Fe III (L Cl,Cl )X] and [Fe III (L Br,Br )X], [29] which show SCO and HS behavior, respectively, the temperature depending magnetic behavior of the six new complexes was analyzed.…”