Syntheses, crystal structures and magnetic properties of a series of μ-phenoxo-μ1,1-carboxylato-μ1,3-carboxylato trinickel(II) compounds

摘要: The work in this report describes the syntheses, characterization, crystal structures and magnetic properties of eight linear trinickel(II) compounds composition [NiII3(Lsal–pyr)2(propionate)4] (1), [NiII3(Lsal–pyr)2(benzoate)4]·CH3CN (2), [NiII3(Lsal–pip)2(acetate)4]·2CH3CN (3), [NiII3(Lsal–pip)2(propionate)4] (4), [NiII3(Lsal–pip)2(benzoate)4]·CH2Cl2 (5), [NiII3(Lsal–mor)2(propionate)4] (6), [NiII3(Lsal–mor)2(benzoate)4]·3CH2Cl2 (7) [NiII3(Lsal–mor)2(o-Cl-benzoate)4]·2CH3CN·2H2O (8), where HLsal–pyr, HLsal–pip HLsal–mor are 1 : 1 condensation products salicylaldehyde 1-(2-aminoethyl)-pyrrolidine, 1-(2-aminoethyl)-piperidine 4-(2-aminoethyl)-morpholine, respectively. One-half trinuclear core each complex is symmetry related to second part due presence an inversion centre on central metal ion so terminal nickel⋯central nickel⋯terminal nickel angle 180°. nickel(II) ions triply bridged by a phenoxo, μ1,1-carboxylato μ1,3-carboxylato moiety. also acts as chelating ligand for ion. Both variable-temperature (2–300 K) susceptibilities at fixed field strength 0.1 T variable-field (up 7 T) magnetization different temperatures (2–10 were recorded. data indicate ferromagnetic interaction all cases with J (Ĥ = −2Jij∑SiSj) values ranging between 2.37 3.89 cm−1 single-ion zero-field parameter (D) 7.21 8.94 cm−1. Satisfactorily simulation both χMT vs. M H has been obtained. Comparison 1–8 those previously published systems reveals some interesting aspects.