Microwave-Assisted Synthesis of a 1-D Water Chain in a Mononuclear Nickel Complex [Ni(bimp)₂]·2H₂O, Where Hbimp is a 4-Bromo-2-iminomethyl-6-methoxyphenol

Abstract

Through the microwave-assisted solvothermal reaction of Ni(ClO₄)₂·6H₂O with 5-bromo-2-hydroxy-3-methoxy-benzaldehyde (Hbhmb) and 25% ammonia, a new nickel(II) compound, (I) [Ni(bimp)₂)]·2(H₂O), C₁₆H₁₈Br₂N₂NiO₆ [where Hbimp = 4-bromo-2-iminomethyl-6-methoxy-phenol], was prepared and its crystal structure was determined by single-crystal x-ray diffraction analysis and further characterized by elemental analysis, infrared (IR) spectroscopy, and thermogravimetry/differential thermal gravimetry (TG-DTG) analysis. The centrosymmetric molecule comprises nickel(II) atoms connected by two bimp ligands in bidentate mode. Complex 1 formed a two-dimensional (2-D) network through O–H···O and C–H···Br hydrogen bonds, which further constructed a three-dimensaionl (3-D) network through O–H···O hydrogen bonds that formed a diverting one-dimensional (1-D) water chain.

Keywords:

• crystal structure
• nickel(II) complex
• water chain

Acknowledgments

The authors acknowledge financial support from the Nature Science Foundation of Guangxi Province of China (0832085, 2010GXNSFA013014), Guangxi Key Laboratory for Advance Materials and New Preparation Technology (0842003–25), and the Startup Foundation for Dr of Guilin University of Technology.