Synthesis, Characterization and Magnetic Studies of a Tetranuclear Manganese(II/IV) Compound Incorporating an Amino-Alcohol Derived Schiff Base

A new tetranuclear mixed-valence manganese(II/IV) compound [Mn^IIMn^IV₃(μ-Cl)₃(µ₃-O)(L)₃] (1) (where H₃L = (3E)-3-((Z)-4-hydroxy-4-phenylbut-3-en-2-ylideneamino)propane-1,2-diol) has been synthesized and characterized by different physicochemical methods. Single crystal X-ray diffraction analysis reveals that 1 is a tetrahedral cluster consisting of a Mn₄Cl₃O₄ core in which the only Mn(II) ion is joined through three μ₂-O bridges to an equilateral triangle of Mn(IV) ions, which are connected by a μ₃-O and three μ₂-Cl bridges. The redox behavior of 1 was studied by cyclic voltammetry. Variable temperature magnetic susceptibility measurements of 1 revealed predominant antiferromagnetic coupling inside the Mn₄Cl₃O₄ cluster. View Full-Text