Synthesis and Characterization of Cu(II), Zn(II), Cd(II) and Hg(II) Complexes of Rabeprazole

Authors

  • Salma Begum Department of Chemistry, Dhaka University, Dhaka- 1000, Bangladesh
  • Humaira Yeasmin Department of Chemistry, Dhaka University, Dhaka- 1000, Bangladesh
  • Tapas Debnath Department of Chemistry, Dhaka University, Dhaka- 1000, Bangladesh
  • AA Shaikh Department of Chemistry, Dhaka University, Dhaka- 1000, Bangladesh
  • Pradip K Bakshi Department of Chemistry, Dhaka University, Dhaka- 1000, Bangladesh

DOI:

https://doi.org/10.3329/dujs.v65i2.54524

Keywords:

Rabeprazole, infrared spectra, thermogravimetry, magnetic susceptibility.

Abstract

Rabeprazole (RPZH) (available as rabeprazole sodium, RPZNa) is a proton pump inhibitor (PPI), widely used for the treatment of acid-related diseases in the stomach and duodenum. It is a weak base with pKa= 4.9 and show a strong ability to form complexes with transition and nontransition metal ions. Its complexes with Cu(II), Zn(II), Cd(II) and Hg(II) have been synthesized and characterized by solubility, melting point, metal content estimation, IR and UV-Visible spectral analysis, magnetic measurement, thermogravimetric analysis, differential scanning calorimetry and X-ray powder diffraction studies. On the basis of metal contents, the complexes have been formulated as [Cu(RPZ)(H2O)Cl], [Zn(RPZ)2], [Cd(RPZ)2].2H2O and [Hg(RPZ)2].H2O. Rabeprazole sodium (RPZNa) loses Na+ ion in solution yielding a monoanionic RPZ that behaves as a bidentate ligand and coordinates through C-N- and S=O groups with the divalent metal ion. Tetrahedral geometry of all complexes is proposed. Zn(II), Cd(II) and Hg(II) complexes have 1:2 metal to ligand stoichiometry while Cu(II) complex possesses ligand to metal ratio of 1:1. Cu(II) and Zn(II) complexes have also been screened for their antibacterial and antifungal activities against several bacteria and fungi.

Dhaka Univ. J. Sci. 65(2): 157-162, 2017 (July)

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Published

2017-07-05

How to Cite

Begum, S., Yeasmin, H., Debnath, T., Shaikh, A., & Bakshi, P. K. (2017). Synthesis and Characterization of Cu(II), Zn(II), Cd(II) and Hg(II) Complexes of Rabeprazole. Dhaka University Journal of Science, 65(2), 157–162. https://doi.org/10.3329/dujs.v65i2.54524

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