Synthesis, Crystal Structure and Bioactivities of a Novel Propeller Shaped Manganese Complex with the Ligand N′‐Benzylidenesalicylhydrazide

Abstract

A new propeller shaped mononuclear manganese(III) complex of the general formula: [MnL 3 (H 2 O)], where HL is N'-benzylidenesalicylhydrazide, was synthesized and characterized. The crystal structure of the title compound was characterized by X-ray single crystal diffractometry, which belongs to a triclinic system with space group P-1, cell dimensions of a＝11.6411 Å, b＝12.728 Å, c＝16.346 Å, α＝110.357°, β＝96.555°, γ＝108.996°, V＝2075.2 Å 3 , Z＝2 and D calc ＝1.265 g/cm 3 . In this complex, the metal ion is in an octahedral coordination environment, enforcing the stereochemistry of the ligands as a propeller configuration. Antibacterial screening data indicate that the complex has stronger antibacterial activity against the tested microorganisms than the ligand.

Mononuclear and dinuclear complexes of manganese(iii) and Iron(iii) supported by 2-salicyloylhydrazono-1,3-dithiane ligand: synthesis, characterization and magnetic properties

“…Besides the previously reported manganese complex supported by three 2-salicyloylhydrazono-1,3dithiolane ligands, 6 another very similar structure was observed in Mn III complex bearing three N9-benzylidenesalicylhydrazide ligands. 16 Attempts to synthesize Mn III 2 (m-OMe) 2 (HL) 4 . Based on the observation that the m-methoxo dinuclear complex 7,8 is usually unstable in solution and probably dissociates into mononuclear entities, which in the solid state again tend to assemble into the well-organized m-methoxo dinuclear structure, we initially focused our efforts on crystallization conditions which could promote the condensation of two mononuclear entities to form the dinuclear complex.…”