Syntheses and characterization of homodinuclear manganese and cobalt complexes bridged by a hemiacetal or by an acetato group in a mu-(eta(2):eta(1)) bridging mode

摘要

The complex [Mn-2(BPMAPS)(mu -OAc)(2)(hemi)]PF6 (1), where hemi is the hemiacetal group, methoxy(2-pyridyl)methoxo, was prepared from bis[3-(2-pyridylmethyleneamino)phenyl] sulfone (BPMAPS), 2-pyridinecarbaldehyde. and manganese(II) acetate in methanol. The complexes Mn-2(BPMAPS)(mu -OAc)(2)(mu -1,1-OAc)(eta (1)-OAc) (2) and Co-2(BPMAPS)(mu -OAc)(2)-[mu-(eta (2):eta (1))OAc](eta (1)-OAc) (3) were prepared from manganese(II) acetate and cobalt(IT) acetate, respectively, with BPMAPS in methanol. All three complexes were characterized by elemental analysis, FT-IR, MS, UV-Vis spectroscopy, and X-ray crystallography. The manganese ions of complex 1 are bridged by a hemiacetal through the oxygen atom of the alkoxo with the nitrogen atom of the pyridine group coordinating to one of the manganese atoms. The metal ions of complexes 2 and 3 are bridged by acetato groups in mu -1,1 or mu-eta (2):eta (1) modes, respectively. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 48]