摘要:
Four Mn-III quadridentate Schiff-base compounds have been prepared and structurally characterized: [Mn(salpn)(CH3OH)(2)]BPh4 (1), [Mn-2(salpn)(2)(N-3)(2)] (2), [Mn-2(salpn)(2)(NCS)(2)] (3), [Mn-2(salpn)(2)(H2O)(2)](H2O)(ClO4)(2) (4) (salpn = N,N'-(1,2-propylene)-bis-(salicylideneiminate)). Among them, 1 is a discrete Mn-III monomeric complex with a square-bipyramidal geometry. Complexes 2, 3 and 4 form the similar phenolate-bridged out-of-plane dimers. Magnetic susceptibility studies reveal that 2, 3 and 4 all exhibit ferromagnetic intra-dimer coupling between Mn-III ions. (C) 2009 Elsevier B.V. All rights reserved.