Abstract
A series of Mn(II) macrocyclic Schiff-base complexes [MnL n Cl] + ( n = 1–4) have been prepared via the Mn(II) templated [1+1] cyclocondensation of 2,6-diacetylpyridine or 2,6-pyridinedicarbaldehyde with the symmetrical 1,4-bis(3-aminopropyl)piperazine or the novel asymmetrical N, N′(2-aminoethyl)(3-aminopropyl)piperazine linear amines containing piperazine moiety. The complexes have been characterized by elemental analyses, IR, FAB-MS, magnetic studies and conductivity measurements. The crystal structure of [MnL 2(CH 3OH)Cl](ClO 4) and [MnL 4Cl](PF 6) complexes have also been determined showing the metal ion in a N 4OCl pentagonal bipyramidal or N 4Cl highly distorted octahedral geometry, respectively.
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