CHEMICAL PROBLEMS

Abstract Comparison of the structural parameters of the monosubstituted complex (tBuCp)2Mo2(CO)6 (1) with the corresponding structural parameters of the disubstituted (1,2-tBu2Cp)2Mo2(CO)6 (3) and unsubstituted Cp2Mo2(CO)6 (2) complexes allowed us to identify the features of the crystal structure (3) caused by the presence of two tert-butyl substituents in the 1,2- (vicinal) position in the cyclopentadienyl (Cp) […]

Abstract Diethyl- and propylamine complexes of a mixture of oligoalkylarylsulfonic acids, synthesized on the basis of the light gas oil fraction obtained from the catalytic cracking process, are proposed as bactericides in combating sulfate-reducing bacteria that cause microbial corrosion. Some physico-chemical properties of the solutions prepared in water, water+ethyl alcohol, water+isopropyl alcohol mixture of these […]

Abstract The influence of simulating factors of a nuclear explosion and proton irradiation on the photoelectric properties of photodiodes based on indium selenide was studied. It was established that neutron pulses lead to an improvement in the photoelectric properties of the photodiodes under study. It has been shown that high fluences of neutron irradiation facilitate […]

Abstract This work describes the preparation and spectroscopic investigation of new heterocyclic compounds derived from the 4-aminoantipyrene moiety. The compound (R1)3-((1,5-dimethyl-3-oxo-2- phenyl-2,3-dihydro-1H-pyrazol-4-yl)diaz-enyl)-4-hydroxybenzaldehyde was prepared by reacting 4- aminoantipyrene with 4-Hydroxybenzaldehyde according to the cold condition at (0-5) Celsius. This represents the starting point to create novel azo-chalcone compounds with a new nucleus as the alpha-beta […]

Abstract H-Zeolite was successfully prepared from a homogenous solution under controlled conditions using a thermal approach with tetramethylammonium bromide as an organic structural directing agent (OSDA), which adjusts the pores size of zeolitic networks and then increases the catalyst efficiency. The synthesized H-zeolite particles were characterized by X-ray Diffraction (XRD) analysis, X-ray Fluorescence (XRF) analysis, […]

Abstract Pharmaceutical polymers based on glycogen as prodrugs were synthesized to enhance the physical and chemical properties, thereby increasing the solubility of the drugs compared to the original drugs. This improvement leads to better efficacy and bioavailability, enhancing their absorption and distribution within the body. The drug release process in prodrugs contributes to sustained pharmacological […]

Abstract In this article, BN 90/30 brand bitumen is modified by adding 5% to 15% acrylic copolymers containing Cu, Zn, Ni, and Sn metals, along with up to 24% sulfur. Copolymers based on acrylic and methyl methacrylate with metals (Ni, Sn, Cu, Zn) were used. Different masses were mixed in a heat-resistant 1000 ml container […]

Abstract The effect of calcination temperature in air of finely dispersed boehmite powders with ferrocene adsorbed at room temperature from n-hexane solution on X-ray diffraction patterns and EPR spectra of calcined samples was studied. It has been shown that calcination in air of boehmite samples with adsorbed ferrocene leads to the decomposition of ferrocene molecules, […]