Abstract

The synthesis, magnetic and structural characterization of two tetrameric copper(II) complexes {N(C4H9)(4))-[Cu-2(LH)(2)(mu(4)-Br)Cu-2(LH)(2])(PF6)(4) (1) and [Cu-2(LH)(2)(mu(4)-Cl)Cu-2(LH)(2)](Cl)(2)(PF6) (2) is described. LH stands for the hemi-deprotonated anion of the tripodal aminophenol ligand N-(2'-pyridylmethyl)-N,N-bis-[2'-hydroxy-5'-methyl-benzyl]-amine. The complexes are tetrametallic species formed around the central halide ion which behaves as an anion template for the formation of the tetranuclear species, by bridging two dimeric phenoxo bridged [Cu-2(LH)(2)](2+) units. The magnetic behaviour is dominated by the strong antiferromagnetic exchange within the dimeric unit, mediated by the phenoxo bridges: J = -439(4) cm(-1), g = 2.10(2) for (1) and J = -429(2) cm(-1), g = 2.090(9) for (2). (C) 2014 Elsevier Ltd. All rights reserved.