Synthesis, crystal structures, and antibacterial property of tris[2-(5-bromosalicylideneamino)ethyl]amine and its manganese(III) complex

A tripodal Schiff base tris[2-(5-bromosalicylideneamino)ethyl]amine (H3L) was prepared by the reaction of 5-bromosalicylaldehyde with tris(2-aminoethyl)amine. Reaction with the Schiff base with manganese perchlorate in methanol resulted a mononuclear manganese(III) complex (I). The crystal structures of the Schiff base and the complex have been determined by single crystal X-ray diffraction (CIF files CCDC nos. 1007902 (H3L); 1007983 (I)). The Schiff base coordinates to the Mn atom through all the phenolate O and imino N atoms. The Mn atom of the complex is in octahedral coordination. The antibacterial properties have been tested on some bacteria and yeast.