Ferro- and antiferromagnetic interactions in face-sharing trioctahedral Ni^IIMn^IINi^IIand Ni^IIFe^IIINi^IIcomplexes with the same 1–5/2–1 spin system

Abstract

Two heterotrinuclear complexes, [Mn(II)(Ni(II)L)2].2CH3OH (where H3L = 1,1,1-tris(N-salicylideneaminomethyl)ethane) and [Fe(III)(Ni(II)L)2]NO3.C2H5OH, consisting of three face-sharing octahedra have been prepared; although these complexes have closely related structures and have the same 1-5/2-1 spin system, they show completely different magnetic interactions between the adjacent metal ions: ferromagnetic (Ni(II)-Mn(II)) and antiferromagnetic (Ni(II)-Fe(III)).

Crystal structures of {1,1,1-tris[(salicylaldimino)methyl]ethane}gallium as both a pyridine solvate and an acetonitrile 0.75-solvate and {1,1,1-tris[(salicylaldimino)methyl]ethane}indium dichloromethane solvate

“…1) was first reported nearly fifty years ago (Johnston, 1974), although its structure was published recently (Yamaguchi et al, 2008b). Complexes of the triply deprotonated ligand, (sal) 3 tame, have been reported with transition metals and lanthanides (Sunatsuki et al, 2008;Yamaguchi et al, 2004Yamaguchi et al, , 2008aYokoyama et al, 2010;Kojima, 2000;Kobayashi et al, 2006;Urushigawa et al, 1977), but have received little attention to date with maingroup elements (Katsuta et al, 2012;Kojima et al, 2000). The H 3 (sal) 3 tame ligand has already been used to synthesize potential technetium radiopharmaceuticals (Marmion et al, 1996).…”

A ferromagnetic linear trinuclear Ni(II)-Schiff base complex supported by phenoxo and cinnamato bridges

“…Octahedrally coordinated polynuclear Ni(II) complexes are an interesting class of compound because of a variety of molecular structures and magnetic interactions [5][6][7][8][9][10][11][12]. With phenol-based tetradentate chelating Schiff base ligands, Ni(II) produces several trinuclear complexes with an additional acetate bridging in the l-1,3 mode.…”

“…Therefore, the development of methods for the preparation of polynuclear complexes of targeted topology and a predefined number of metal atoms is an essential step for the investigation of this phenomenon. Self-assembly of first-row transition metals with suitable bridging ligands has proved to be a very powerful approach for well-defined arrangements of metal ions [3,4].Octahedrally coordinated polynuclear Ni(II) complexes are an interesting class of compound because of a variety of molecular structures and magnetic interactions [5][6][7][8][9][10][11][12]. With phenol-based tetradentate chelating Schiff base ligands, Ni(II) produces several trinuclear complexes with an additional acetate bridging in the l-1,3 mode.…”

“…With phenol-based tetradentate chelating Schiff base ligands, Ni(II) produces several trinuclear complexes with an additional acetate bridging in the l-1,3 mode. It is worth noting that variable temperature magnetic studies have been performed [6][7][8][9][10][11][12] only in a few of these complexes and antiferromagnetic coupling was observed. However, a tridentate reduced Schiff base (2-methyl-2-(2-methyl-benzylamino)-propan-1-ol) is found to produce a ferromagnetically coupled trinuclear Ni(II) complex [13].…”

Crystal Structure of Octahedral Coordinated Trinuclear Cu(II) Complex 1,1,1-Tris(N-salicylideneaminomethyl)ethane

“…Some crystal structures of the analogous trinuclear metal complexes with H3L have been reported. [2][3][4] The trinuclear copper(II) complex [Cu3L2] of octahedral coordination geometry has not yet been reported. Each coordination geometry of [Cu3L2] would depend on its preparative condition.…”