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

The trinuclear manganese(II) complexes, [MnII3(OAc)4(pap)2(H2O)2] and [MnII3(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 MnII(OAc)2·2H2O. 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 O6 donor set of four oxygen atoms from four bridging OAc− and two phenolic oxygen atoms of two X-pap ligands.