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

• Main Authors: Madhusudan Nandy, Shyamapada Shit, Georgina Rosair, Carlos J. Gómez-García
• Format: Article
• Language: English
• Published: MDPI AG 2018-12-01
• Series: Magnetochemistry
• Subjects: tetranuclear cluster; manganese(II/IV); Schiff base; crystal structure; tetrahedral clusters; electrochemistry; antiferromagnetic coupling
• Online Access: https://www.mdpi.com/2312-7481/4/4/57
• ISSN: 2312-7481

A new tetranuclear mixed-valence manganese(II/IV) compound [Mn^IIMn^IV₃(&#956;-Cl)₃(&#181;₃-O)(L)₃] (<b>1</b>) (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 <b>1</b> is a tetrahedral cluster consisting of a Mn₄Cl₃O₄ core in which the only Mn(II) ion is joined through three &#956;₂-O bridges to an equilateral triangle of Mn(IV) ions, which are connected by a &#956;₃-O and three &#956;₂-Cl bridges. The redox behavior of <b>1</b> was studied by cyclic voltammetry. Variable temperature magnetic susceptibility measurements of <b>1</b> revealed predominant antiferromagnetic coupling inside the Mn₄Cl₃O₄ cluster.