Synthesis and structural characterization of a new high-valent bis(oxo)-bridged manganese(IV) complex and its catechol oxidase activity.
- Resource Type
- Article
- Authors
- Mondal, Dhrubajyoti; Chandra Majee, Mithun
- Source
- Inorganica Chimica Acta. Aug2017, Vol. 465, p70-77. 8p.
- Subject
- *PYRIDINE synthesis
*CATECHOLASE
*QUINONE
*CATECHOL
*MANGANESE group
*OXIDASE regulation
- Language
- ISSN
- 0020-1693
The work in this report presents the synthesis, structural and spectroscopic characterization of a new type of high-valent bis(oxo)-bridged dimanganese(IV) complex 1 supported by a pyridine and phenol based tetradentate flexible N 3 O donor HL ligand (where HL = 2-benzyl-6-((bis(pyridin-2-ylmethyl)amino)methyl)-4-chlorophenol). Complex 1 possess unique Mn 2 ( μ -O) 2 core with short Mn⋯Mn distances (2.65 Å) and Mn–O distance (1.80 Å). This dinuclear manganese(IV) complex show excellent catecholase-like activity for the aerobic oxidation of 3,5-di- tert -butylcatechol to the corresponding o -quinone in acetonitrile at 25 °C. Kinetic measurements suggest that the rate of catechol oxidation follows saturation kinetics with respect to the substrate and first order kinetics with respect to the catalyst. [ABSTRACT FROM AUTHOR]