1,3-Bis(salicylideneamino)-2-propanol as the Ligand for Manganese(III) Ions

Abstract

Reaction of 1,3-bis(salicylideneamino)-2-propanol (H3L) with manganese(II) acetate tetrahydrate in the presence of ethylenediamine and sodium thiocyanate give a salen complex [Mn(salen)(NCS)] (H2salen = N,N′-disalicylideneethylenediamine), while that in the presence of water and triethylamine gives a binulear manganese(III) complex [Mn2(L)2(H2O)]·3CH3OH. Both complexes have been characterized by X-ray crystal structure analyses, electronic spectra, and magnetic susceptibilities.

Synthesis and Crystal Structures of Dinuclear Cobalt(III) Complexes with 1,3-Bis(5-nitrosalicylideneamino)-2-propanol and 1,3-Bis(3-nitrosalicylideneamino)-2-propanol

“…A similar structural feature was found in the crystal structures of the dinuclear manganese(III) complexes with the related Schiff-base ligands. 5 The electronic spectral features of 1 and 2 are consistent with the low-spin cobalt(III), showing characteristic d-d bands in the visible region (Fig. 6).…”

“…1 A similar folded form was observed in the crystal structure of a related dinuclear manganese(III) complex with 1,3-bis-(salicylideneamino)-2-propanol. 5 In this study, we synthesized a cobalt complex by using H3b5nsalpr, so as to see what kind of species can be isolated, because there is no report concerning to crystal structure of a cobalt complex with H3b5nsalpr. We successfully isolated a cobalt complex [Co2(b5nsalpr)2(CH3OH)] (1) (Fig.…”

New dimanganese(III) complexes of pentadentate (N2O3) Schiff base ligands with the [Mn2(μ-OAc)(μ-OR)2]3+ core: Synthesis, characterization and mechanistic studies of H2O2 disproportionation

“…Hydrogen atoms have been omitted for clarity. Table 2 Selected bond lengths (Å ) and angles (°) for [ (12) (2) 97.58 (13) complex obtained with salpentOH [33]. This fact shows that substitution of the imino H atom by a phenyl group in the Schiff base ligand does not modify the geometric parameters of the bimetallic core of the resulting complex.…”

Magnetic assemblies based on Mn(III) salen analogues

“…Indeed, structural evidence of both species has been obtained from the crystallization of similar reactions: for example, there is a monomer [ Table 2 Pertinent bond distances (Å) and Angles ( • ) for Mn(III) out-of-plane dimeric complexes and magnetic parameters obtained from the simulation of the magnetic susceptibility (F = ferromagnetic interaction, AF = antiferromagnetic interaction, NI = non-interaction, nd = no data in the literature) Table 3 Pertinent bond distances (Å) and angles ( • ) for Mn(III) salen out-of-plane dimeric cores in metal-assembled compounds and magnetic parameters obtained from the simulation of the magnetic susceptibility (F = ferromagnetic interaction, AF = antiferromagnetic interaction, NI = non-interaction, nd = no data in the literature) The Mn(III) salen out-of-plane dimers are of great interest from a magnetic point of view. A number of such compounds have been structurally characterized and magnetically investigated so far [66,[93][94][95][96][97][98][99][100][101][102][103][104][105]58,48,41,67,94,11,49,76,45,51]. Furthermore, hetero-metal assembled compounds containing the Mn(III) dimer moiety were also designed (Section 5).…”