Synthesis, Spectral and Antibacterial studies of some transition metal complexes with Schiff base derived from thiosemicarbazide and Phthalaldyde
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Schiff base, metal complexes, Spectroscopic study, Biological activity
Abstract
Three transition metal Cr(III), Ni(II) and Cu(II) complexes of the Schiff base N,N՛-((1Z,1՛E)1,2-phenylenebis(methanelylidene)-bis(hydrazinecarbothioamide) have been synthesised and investigated using several techniques: physical characteristics, UV-Vis, mass spectra, molar conductivity, magnetic moment measurements, micro-analytical data (CHNS), 1HNMR and IR. The micro-analytical data indicate the formation of a 1:1[M:L] ratio. The molar conductance measurement showed that the [NiL(Cl)2] complex has non-electrolytic nature. The molar conductance measurements of the complexes [Cr(H2L)(Cl)2 and [Cu(H2L)(H2O)2]Cl2 were electrolyte in nature and [Ni(H2O)Cl2] was non-electrolyte in nature. The infrared spectral data displayed the main coordination sites of N,N՛-((1Z,1՛E)1,2-phenylenebis (methane lylidene)-bis(hydrazinecarbothioamide) towards Cr(III), Ni(II) and Cu(II) ions. The electronic spectral results exhibited the presence of the electronic transitions in the free Schiff base and its complexes, the data suggested that the Cr(III), Ni(II) and Cu(II) complexes have an octahedral geometrical structure.
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