Structure and magnetic properties of a trinuclear nickel(II) complex with benzenetricarboxylate bridge

Novel trinuclear Ni(II) complex [Ni-3(pmdien)(3)(btc)(H2O)(3)](ClO4)(3)center dot 4H(2)O, 1 where pmdien = N, N, N ', N ', N ''-pentamethyldiethylenetriamine, H(3)btc = 1,3,5-benzenetricarboxylic (trimesic) acid, has been prepared and structurally characterized. Three nickel atoms are bridged by btc trianion and their coordination sphere is completed by three N atoms of pmdien and O atom of the water molecule. The three nickel(II) magnetic centers are equivalent and their coordination spheres are completed to deformed octahedrons. Magnetic susceptibility was measured over the temperature range 1.8-300 K and zj ' = -0.19 cm (1), D = 3.79 cm (1), g = 2.18 parameters were calculated. (C) 2008 Elsevier B.V. All rights reserved.