SYNTHESIS AND CHARACTERIZATION OF METAL COMPLEXES OF SACCHARIN NI, CU, CO, MN
Abstract
ABSTRACT
This research investigates the synthesis and characterization of saccharin-based metal complexes
of nickel(II) and copper(II). The study employed standard aqueous–ethanolic methods for the
preparation of the complexes, followed by comprehensive physicochemical and spectroscopic
analyses. Physical characterization revealed distinct colours and crystalline properties indicative
of successful complex formation. Percentage yields ranged between 62% and 81%, demonstrating
efficient coordination reactions. Solubility tests showed moderate solubility in polar organic
solvents and low solubility in water, while molar conductivity measurements confirmed non
electrolytic behavior for all complexes. Infrared spectroscopy established bidentate coordination
through the imide nitrogen and sulfonyl oxygen atoms of saccharin. UV–Visible spectroscopy
indicated high-spin octahedral geometries for Ni(II), and a distorted octahedral geometry for Cu(II)
due to Jahn–Teller effects. Magnetic susceptibility results further supported the proposed
structures, while thermogravimetric analysis revealed multi-step decomposition consistent with
coordinated water loss and eventual metal oxide formation. Overall, the findings confirm that
saccharin effectively forms stable octahedral complexes with transition metals, highlighting their
potential applications in catalysis, materials science, and medicinal chemistry.
Full-Text Access Notice
In accordance with the NERD Policy on promoting peer-reviewed publication, public access to the full text of a project, thesis or dissertation is restricted for three years, allowing the author and supervisors sufficient time to pursue peer-reviewed publication.
During this period, researchers with legitimate academic or research purposes may request authorisation directly from the author to enable NERD to release the indexed full texts of the work using the form below.