Preparation and structures of trinuclear manganese(II) complexes with N-2-pyridiylmethylidene-2-hydroxy-5-substituted-phenylamine

The trinuclear manganese(II) complexes, [Mn-3(II)(OAc)(4)(pap)(2)(H2O)(2)] and [Mn-3(II)(OAc)(4)(5-Cl-pap)(2)(MeOH)(2)] were prepared by the reaction of tridentate Schiff base ligands X-papH (X = H, Cl), [N-2-pyridiylmethylidene-2-hydroxy-5-substituted-phenylamine], and Mn-II (OAc)(2).2H(2)O. In the molecular structures of these complexes, two terminal manganese ions are coordinated with one oxygen and two nitrogen atoms of X-pap, two oxygen atoms of OAc- and a solvent molecule, to form a distorted octahedral structure where the central manganese ion resides on a center of symmetry and is surrounded by an 06 donor set of four oxygen atoms from four bridging OAc- and two phenolic oxygen atoms of two X-pap ligands. (C) 2002 Elsevier Science B.V. All rights reserved.