CHEMICAL PROBLEMS

Abstract: Through the pyrazine-modulated tetrapyridyltriamine ligand N2-(pyrazin-2-yl)-N6-(6-(pyrazin-2ylamino)pyridin-2-yl)pyridine-2,6-diamine (H3pzpz) (1), a new mononuclear copper(II) complex [Cu(H3pzpz)(NO3)]·NO3·3H2O (2) has been synthesized and structurally characterized. The copper(II) atom in complex 2 exhibits a distorted square pyramidal geometry with an Addison parameter value of 0.39 (σ = 0.39). In compound (2), H3pzpz (1) acts as a tetradentate N4-donor ligand […]

Abstract This article presents the results of the bactericidal properties of 10%, 15%, and 20% solutions of amidoamines synthesized from oleic acid and diethylenetriamine in isopropyl alcohol against sulfate-reducing bacteria of the “Desulfovibrio desulfurican” species. For this purpose, amidoamine compounds were synthesized with a 95–98% yield using oleic acid and diethylenetriamine in 1:1 and 2:1 […]

Abstract: A series of fused heterocyclic compound Triazolothiadiazole Derivatives 4a-4f was produced by treating 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiol (3) with aryl aldehydes in the presence of KOH. The new triazolothiadiazole derivatives demonstrated anticancer efficacy through docking with the EGFR tyrosine kinase receptor protein, evidenced by docking scores ranging from (-3.23) to (-3.99) kcal/mol in comparison to the control […]

Abstract In this study, the authors chemically synthesized new theophylline derivatives and then evaluated them in vitro as antimicrobial agents. The target derivatives, theophylline derivatives conjugated with 1,2,3- triazole and piperazine moieties, were synthesized via sequential various reactions. Spectroscopically, the researchers employed FT-IR, 1H NMR, and 13C NMR techniques to get further insights into these […]

Abstract Due to the significant impact on enhancing the rheological properties of asphalt, many researchers were eager to enhance the specifications of asphalt by employing different additives, particularly polymeric additives. This is attributed to their significant impact on enhancing the rheological properties of asphalt that make it more suitable for a variety of uses, particularly […]

Abstract Five novel reagents were suggested for mercury (II) photometric determination: 2- hydroxythiophenol and its derivatives (HTDs), namely 2,5-dihydroxythiophenol, 2-hydroxy-5- fluorothiophenol, 2-hydroxy-5-chlorothiophenol, 2-hydroxy-5 – bromothiophenol, 2- hydroxy – 5- iodothiophenol. The molar absorptivity coefficient was (2.4-3.3)×104 (λ=450-480 nm). The optimal conditions for the complexation reaction correspond to pH range of 4.1 – 7.2. It has […]

Abstract This study investigated the synthesis of nickel phthalocyanine pigment and the physicochemical properties of the obtained pigments using a boron-containing catalyst. As part of the research, the technology for securing nickel phthalocyanine pigment was developed and its molecular structure, thermal stability, SEM analysis, spectral properties, and other physicochemical parameters were analyzed. The obtained results […]

Abstract The present work demonstrates the thermodynamic study of copper arsenides using electromotive force measurements with a solid Cu⁺ conductive electrolyte, Cu₄RbCl₃I₂, within the temperature range of 300– 440 K. Measurements were performed using the equilibrium samples from the Cu₃As + As, Cu₃As + Cu₈As, and Cu₈As + (Cu) two-phase regions of the Cu-As system. […]