Mechanochemical Synthesis and Characterization of Fe (II), Co (II), and Ni (II) Complexes Derived from Paracetamol

Abstract

Solid-state synthesis of metal (II) complexes with paracetamol (ligand) was performed 
mechanically in a 1:2 ratio. The complexes have been characterized. From the IR and 
electronic spectral studies, the spectra of the complexes were different from those of ligands 
suggesting the formation of coordinations compound. Paracetamol was found to be bidentate 
ligand in which metal (II) complexes coordinated through the oxygen atom of carbonyl of 
ketone and the nitrogen atom of amide in which the complexes are assumed to have octahedral 
geometry. The melting point temperature of the ligand at 174.20C shows that it is stable at low 
temperatures while the decomposition temperatures of Fe, Ni, and Co complexes respectively 
at 229⁰C, 245⁰C, and 237⁰C show that they are stable. The conductivity measurement shows 
that the complexes were found to be non-electrolytic as compared with the theoretical values. 
The suggestion of the complexes can also be provided by their magnetic moment, in which 
magnetic susceptibility studies proved that all the synthesized complexes are paramagnetic. 
The paracetamol and its complexes are soluble in DMSO, and insoluble in ethanol and 
distilled water. Paracetamol is a very interesting ligand and so many researchers synthesized 
such as using solution-based synthesis. This work has demonstrated the use of a solid-state 
method (a reliable method) to obtain the same result.