" Preparation of the new vanadyl N-acetyl benzamide complex VO(C9H8NO2)2 and its comparison with the vanadyl Di- acetylacetone complex (C10H14O5V), as well as the study of their physical and chemical properties

Abstract

Vanadium complexes have been used in various fields, including medicine for treating cancer tumors and diabetes. Additionally, they have been widely applied in industrial and pharmaceutical applications, playing a significant role in biological processes, environmental protection, electrochemistry, dye manufacturing, agriculture, and materials science. Due to the effectiveness of vanadium in chemical processes and the ability of vanadyl ions (VO)²⁺ to form moderately charged complexes with anions of bidentate organic compounds, these resulting complexes are stable. Based on this, vanadyl N-acetyl benzamide complex with the general chemical formula VO(C₉H₈NO₂)₂ was prepared, featuring an octahedral coordination number of 6. The identity of the complex was determined using FT-IR spectroscopy, which showed the characteristic band of the central atom (V=O) in the spectrum of N-acetyl benzamide complex, as well as the distinctive band for the (V-O) bond. Some physical properties were also characterized, including melting point, color, and appearance. The N-vanadyl acetyl benzamide complex exhibited a gray color, in contrast to the green-blue color of the vanadyl Diacetylacetone complex. The melting point of the   N- vanadyl acetyl benzamide complex was above 400 degrees Celsius, compared to the melting point of the vanadyl Diacetylacetone complex, which was 235 degrees Celsius. Moreover, the prepared complex was characterized by its very high solubility in water and its insolubility in many organic solvents. The maximum absorptivity of the complex was studied using UV-Visable spectroscopy, where the maximum absorptivity was obtained at a wavelength of 223 nm (λmax). From these spectra, we concluded that the prepared compound and its complexes matched those that were proposed.