The Construction of a Novel Bromido- and Azido-Bridged Dinuclear Copper(II) Complex Derived From 4-Chloro-2-[(2-hydroxyethylimino)methyl]phenol

Abstract

A novel bromido-and azido-bridged dinuclear copper(II) complex, [Cu 2 Br 2 L 2 ]·[Cu 2 Br(N 3 )L 2 ]·H 2 O, where L is the deprotonated form of the Schiff base 4-chloro-2-[(2-hydroxyethylimino)methyl]phenol, has been prepared and structurally characterized by elemental analysis, IR spectra, and single crystal X-ray crystallography. Each Cu atom in the complex is coordinated by three donor atoms of Schiff base ligand and by two bridging atoms, forming a square pyramidal geometry. The bromide and azide ligands are preferred bridging groups for the construction of dinuclear copper complexes with Schiff bases. INTRODUCTIONDinuclear complexes with bridging groups are currently attracting much attention for their interesting structures and wide applications. [1][2][3] The Schiff bases derived from salicylaldehyde and its derivatives are a kind of versatile ligands in coordination chemistry. The rational design and construction of dinuclear complexes with Schiff bases are of particular interest in coordination and structural chemistry. As is well known, the halide and pseudohalide groups can link two or more metal atoms, yielding various polynuclear complexes. [4][5][6][7][8][9] To our knowledge, there are no bromido-bridged dinuclear copper complexes with Schiff bases derived from salicylaldehyde and its derivatives have been reported so far. In this study, a novel dinuclear Schiff base copper(II) complex with bromide and azide bridges, [Cu 2 Br 2 L 2 ]·[Cu 2 Br(N 3 )L 2 ]·H 2 O, where L is the deprotonated form of the Schiff base 4-chloro-2-[(2-hydroxyethylimino)methyl]phenol (HL; Scheme 1), was successfully prepared and characterized.