Synthesis, crystal structure, and antimicrobial activity of a novel chlorido-bridged dinuclear manganese(III) complex derived from N,N′-bis(5-methylsalicylidene)diethylenetriamine

ABSTRACT

A novel chlorido-bridged dinuclear manganese(III) complex, [Mn₂L₂(μ-Cl)Cl₂)]·Cl·0.5CH₃OH, where L is the zwitterionic form of N,N’-bis(5-methylsalicylidene)diethylenetriamine, has been prepared and characterized by elemental analyses, IR, and single-crystal X-ray crystallographic determination. The crystal of the complex is monoclinic: space group C2/c, a = 20.0300(9), b = 22.8494(8), c = 22.127(1) Å, β = 112.882(3)°, V = 9330.0(7) ų, Z = 8. The asymmetric unit of the compound contains two dinuclear manganese complex cations, two chloride anions, and one methanol solvate. The Schiff base ligand coordinates to two Mn atoms through the phenolate O and imine N atoms, with the amine N atom protonated. The effect of the complex on the antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans was studied.

KEYWORDS:

• Schiff base
• manganese complex
• crystal structure
• dinuclear complex
• antibacterial activity

Funding

This research was supported by the National Sciences Foundation of China (nos. 20676057 and 20877036) and Top-Class Foundation of Pingdingshan University (no. 2008010).