Synthesis and Characterization of Metal Complexes with 4-Methyl-N-(p-methylphenylsulphonyl)-N-(pyridin-2-yl)benzene Sulphonamide

Abstract

4-methyl-N-(p-methylphenylsulphonyl)-N-(pyridin-2-yl)benzene sulphonamide is an important sulphonamide derivative that houses multiple essential moieties like pyridine nucleus, benzene core and sulphonamide. The research is aimed at the synthesis of 4-methyl-N-(p-methylphenylsulphonyl)-N-(pyridin-2-yl)benzene sulphonamide via the ditosylation of 2-aminopyridine. The ditosylated 2-aminopyridine was complexed with Zinc (II) ion and Copper (II) ion. The structural elucidations were achieved through UV–Vis, FTIR, 1HNMR, 13CNMR, ESI-MS and Micro-analysis. The data of the elemental analysis agrees with the molecular masses of ESI-MS. The molar conductance revealed that all the complexes are non-electrolyte in nature. The UV-VIS electronic band of 375–362 nm was assigned to n → π* electronic transition of ligand metal charge transfer (LMCT) of zinc (II) complex while 490–358nm and 690nm were assigned to n → π* electronic transition of ligand metal charge transfer (LMCT) and d→ d to electronic transition of copper (II) complex respectively. The infrared (IR) spectra studies indicated the bond between the ligand and the transition metals. The spectra of the complexes showed an absorption shift, with the free ligand of azomethine having the absorption band of 1689.70 cm-1 while that of the complexes, Zn (II) and Cu(II) have the absorption bands of 1674.27cm-1 and 1651.12cm-1 respectively. The complexation of 4-methyl-N-(p-methylphenylsulphonyl)-N-(pyridin-2-yl)benzene sulphonamide may hopefully increase the biological and catalytic potential of the ligand in the pharmaceutical and chemical industries.