Synthesis and Crystal Structure of a Five‐Coordinated Cu(II) Dimer with 4,4′‐Dibromo‐2,2′‐[ethylenedioxybis(nitrilomethylidyne)]diphenol

A novel Cu(II) dimer, [CuL]₂, has been synthesized by the reaction of H₂L and Cu(CH₃COO)₂ · H₂O with a 1:1 mole ratio in the mixed solvents of acetone and methanol, and characterized by elemental analysis, IR, TG‐DTA etc., where H₂L=4,4′‐Dibromo‐2,2′‐[ethylenedioxybis(nitrilomethylidyne)]diphenol. The crystal structure was determined by single‐crystal X‐ray diffraction analysis. In one dimer molecule, the Cu:L is 2∶2, and the coordination number of every copper(II) atom is five.

Keywords:

• copper(II) dimer
• synthesis
• characterization
• crystal structure

This work was supported by the Foundation of the Education Department of Gansu Province (No. 0604‐01) and the ‘Qing Lan’ Talent Engineering Funds of Lanzhou Jiaotong University (QL‐03‐01A), which are gratefully acknowledged.