Synthesis and characterization of tolbutamide–molybdenum complex by thermal, spectral and X-ray studies

Synthesis and characterization of molybdenum complex with tolbutamide (an oral antidiabetic drug) have been studied. The conductometric titration using monovariation method indicates that complex is non-ionic and of L2M type. Analytical data agree with the molecular formula (C12H17N2O3S)2MoÆ2H2O. Structure of the complex was assigned as octahedral in which ligand molecules lie horizontally joining the central molybdenum atom and one water molecule, each attached vertically with the metal. Infra-red spectral studies confirm the coordination of sulphonyl oxygen on one side and enolic oxygen attached from other side with the metal ion. IR and ^1H NMR studies support structure II proposed on the basis of analytical data. Magnetic susceptibility data suggested that the complex is diamagnetic. Thermal studies support the presence of ligand moieties and coordinated water. X-ray diffraction data also support the complex formation.