Syntheses and spectral characterization of some novel 1Hbenzothiazole derivatives and their Cu(II) complexes

Four novel Cu(II) complexes of the 2-(substituted 1H-pyrazole-4-yl)-1H-benzothiazole lignads (3a-d) have been prepared and characterized by various physico-chemical studies. The molar conductance measurements suggest that all complexes are non-electrolytes. Electronic spectral and magnetic susceptibility study indicates the distorted square planar or octahedral geometry for Cu(II) complexes. Infrared spectral study discloses the monodentate behavior of new benzothiazole ligands (3a-d) coordinated through tertiary nitrogen. The condensation of 2- aminothiophenol with substituted 1H-pyrazole-4-carbaldehydes (2a-d) shape ups the 2-(substituted 1H-pyrazole-4- yl)-1H-benzothiazole (3a-d) ligands. The formation of (3a-d) derivatives is explained by 1H NMR, FT-IR and Mass spectral studies

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