New mixed-anion zinc(II) complexes, [Zn(phen)₂(CCl₃COO)(H₂O)](NO₃) and [Zn(bpy)₂(CH₃COO)](ClO₄) · H₂O; synthesis, characterization and crystal structures

Abstract

Zinc(II) complexes with 1,10-phenanthroline (phen) and 2,2′-bipyridine (bpy) containing two different anions have been synthesized and characterized by elemental analysis, IR-, ¹H NMR-, ¹³C NMR spectroscopy. The single crystal X-ray data of [Zn(phen)₂(CCl₃COO)(H₂O)](NO₃) show the complex to be monomeric and the Zn atom with an unsymmetrical six-coordinate geometry, coordinated by four nitrogen atoms of “phen”, one trichloroacetate and one water. The crystal structure of [Zn(bpy)₂(CH₃COO)](ClO₄) · H₂O shows each zinc atom chelated by the nitrogen atoms of “bpy” and also two oxygen atoms of acetate. From the infrared spectra and X-ray crystallography, it is established that coordination of the carboxylate group to zinc is different for trichloroacetate and acetate.

Keywords:

• Zinc(II) complex
• Mixed-anion complex
• 1,10-Phenanthroline
• 2,2′-Bipyridine

Acknowledgement

Support of this investigation by Tarbiat Modarres University is gratefully acknowledged.

Notes

Email: [email protected]

Additional information

Notes on contributors

Ali R. Mahjoub∗

Email: [email protected]