Spectroscopic, electrochemical and biological studies of the metal complexes of the Schiff base derived from pyrrole-2-carbaldehyde and ethylenediamine

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Abstract

The new symmetrical Schiff base N,N′bis(pyrrole-2-carbaldehyde)ethylenediamine and its Mn(II), Co(II), Ni(II) and Cu(II) complexes were synthesized and characterized by spectral, magnetic and electrochemical studies. The spectral studies of the complexes reveal that the ligand has coordination through the azomethine nitrogen atoms, pyrrole nitrogen atoms and anions, supported by octahedral geometry. Mass spectrum explains the successive degradation of the molecular species in solution and justifies ML complexes. The electrochemical study indicates that the pyrrole ring stabilizes the metal ion, makes the complex more positively charged, and causes it to be more easily reduced. The molecular structure of the complexes has been optimized by MM2 calculations and suggests an octahedral geometry. Powder X-ray diffraction allows us to determine the cell parameters of the complexes. The bio-efficacy of the ligand and their complexes has been examined against the growth of bacteria in vitro to evaluate their anti-microbial potential.

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Singh, B. K., Mishra, P., Prakash, A., & Bhojak, N. (2017). Spectroscopic, electrochemical and biological studies of the metal complexes of the Schiff base derived from pyrrole-2-carbaldehyde and ethylenediamine. Arabian Journal of Chemistry, 10, S472–S483. https://doi.org/10.1016/j.arabjc.2012.10.007

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