A carbohydrazone based tetranuclear Co(II) complex: Self-assembly and magnetic property

• Tetranuclear Co(II) complex with [2 × 2] rectangle grid structure.
• 1 displays antiferromagnetic interaction between the HS Co(II) ions.
• R2 of the ligand influences the electromagnetic environment of the metal centers.

A tetranuclear cobalt(ΙΙ) complex [Co(HLMe,Me)]4(ClO4)4·5CH3OH·1.5H2O (H2LMe,Me = 1,5-bis(1-(6-methylpyridine-2-yl)ethylidene)carbonohydrazide) was achieved by self-assembly and characterized by X-ray crystallographic analysis and magnetic measurement. In the Co4 rectangle grid, the Co(ΙΙ) centers are in a distorted octahedral environment with N4O2 or N5O coordination spheres and bridged by two μ-O bridges and two μ-N–N bridges, respectively. Variation in R2 site of the ligand influences the electromagnetic environment of the metal centers to some extent. The magnetic investigation indicates that there is an antiferromagnetic interaction between the HS Co(II) ions.

A tetranuclear cobalt(ΙΙ) complex [Co(HLMe,Me)]4(ClO4)4·5CH3OH·1.5H2O with rectangle grid structure was self-assembled by a new carbohydrazone based ligand. Antiferromagnetic interaction between the HS Co(II) ions was found. Variation in R2 site of the ligand influences the electromagnetic environment of the metal centers to some extent.Figure optionsDownload as PowerPoint slide