163812-96-2Relevant academic research and scientific papers
Di(phenoxo)-bridged Dinuclear Mn2(II,II) and Mn2(II,III) Complexes of Macrocyclic Ligands: Structure, Properties, and Catalase-Like Function
Wada, Hisae,Motoda, Ken-ichiro,Ohba, Masaaki,Sakiyama, Hiroshi,Matsumoto, Naohide,Okawa, Hisashi
, p. 1105 - 1114 (1995)
Dinuclear Mn2(II,II) complexes m,n)(RCOO)2> ((m,n)=(2,3), (2,4), (3,3); R=CH3, C6H5) have been prepared where (Lm,n)2- denotes dinucleating macrocycles with two 2,6-bis(iminomethyl)-4-methylphenolate entities combined through two lateral chains, -(CH2)m- and -(CH2)n-, at the imino nitrogens.The complex 3,3)(CH3COO)2> crystallizes in the monoclinic space group P21/n with a=18.795(5), b=7.608(2), c=10.081(1) Angstroem, β=92.89(2) deg, V=1439.7 Angstroem3, and Z=2.The refinement converges with R=6.38 and Rw=9.63percent based on 2727 reflections with Fo>/=3?(Fo).A pair of Mn(II) ions are bridged by the two phenolic oxygens with a Mn-Mn separation of 3.367(1) Angstroem.An acetate group coordinates bidentately to each Mn(II) to afford a six-coordinate geometry about the metal ion.The oxidation of 3,3)(CH3COO)2> with Br2 forms a mixed-valence Mn2(II,III) complex 3,3)(CH3COO)Br2>*H2O.The Mn2(II,II) and Mn2(II,III) complexes show catalytic activity for decomposing H2O2 in DMF or DMSO.The involvement of the Mn2(II,III)/Mn2(II,IV) cycle in the catalytic process is inferred based on visible and ESR spectroscopic studies of the reaction mixture.
