Prepared and characterized complexes formed by imine from 2,2,6,6-tetramethyl-3,5-heptanedione, involving samarium and zinc as the metal centers

Naeem, Wafaa Sabt; Husien, Jassim Abas; Hateet, Rashid Rahim

doi:10.66723/zjhms.2026.191146

	Prepared and characterized complexes formed by imine from 2,2,6,6-tetramethyl-3,5-heptanedione, involving samarium and zinc as the metal centers
Al-Zahraa Journal for Health and Medical Sciences
Volume 4, Issue 1, March 2026, Pages 1-13 PDF (972.18 K)
Document Type: Research Article
DOI: 10.66723/zjhms.2026.191146
Authors
Wafaa Sabt Naeem^* ¹; Jassim Abas Husien²; Rashid Rahim Hateet³
¹University of Misan
²Department of Chemistry, College of Science, University of Misan, Misan, Iraq
³Department of Biology, College of Science, University of Misan, Misan, Iraq
Abstract
A Schiff base ligand was prepared by reacting 2,2,6,6-tetramethyl-3,5-heptanedione (a diketone) with primary amines in both aliphatic and aromatic forms. The process employed was microwave-assisted, which is considered environmentally friendly because it eliminates the needed for solvents, lowers chemical hazards, and greatly accelerates reaction times compared to conventional methods. The resulting compounds were characterized using a comprehensive set of nuclear magnetic resonance (NMR) techniques, including ¹H-NMR, ¹³C-NMR, HSQC, and COSY experiments. These spectroscopic methods were crucial due to the structural ambiguity caused by tautomerism. The detailed analysis confirmed the successful formation of the imine (–C=N–) group, verified the ligand structures, and established a solid basis for their further use in coordination chemistry and potential biological activity testing. Overall, the results indicated that microwave-assisted synthesis provides a simple, energy-efficient, and environmentally friendly approach for preparing Schiff base ligands derived from diketones. This method can be extended to design a wide range of Schiff bases with tailored properties for use in catalysis, materials, and pharmaceutical applications.
Keywords
Samarium metal; Zinc metal; NMR; β-Diketone; Imine compound

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