Crystalline architectures of copper II complexes derived from halogen substituted carbonyl compounds interplay of covalent and non covalent forces

Abstract

The current scenario of coordination chemistry is witnessing the exploitation newlineof coordination bonds and noncovalent interactions to generate self-assemblies of newlinevarious dimensions having not only aesthetic values but also countless applications newlineand that paved way for supramolecular chemistry/crystal engineering. Most of newlinesuch fascinating work employs Schiff bases obtained by the condenzation of an newlineamine and a carbonyl compound. The use of diamines in the synthesis of highnuclearity complexes utilizes the bridging capacity of phenoxo atoms. Whereas in newlinethe case of N2O donor tridentate Schiff bases (N-substituted diamines with newlinesalicylaldehyde or its derivatives), coligands are employed to generate structures of newlinevariable composition apart from satisfying the coordination number. Among the newlinevarious coligands known, pseudohalides (azido, cyanato, thiocyanato, dicyanamido) newlinedeserve special attention on account of its versatile modes of binding. In addition newlineto the structural variety, such Schiff base complexes have its signature in the field newlineof catalysis, luminescence, gas adsorption and magnetic materials which make the newlinearena conspicuous. The recognition of plasticity of copper(II) metal with respect to its coordination number and its ubiquitous nature as active sites in many metalloenzymes fuelled us to work with this metal. T newline