Visible light photocatalysis in synthesis of pharmaceutically relevant heterocyclic scaffolds

Visible light and photoredox catalysis have emerged as a powerful and long-lasting tool for organic synthesis, demonstrating the importance of a variety of chemical bond formation methods. Natural products, physiologically...

Modern materialistic understanding of the “energy” notion and the method of its systemic evaluation in chemicals

It was shown that the traditional approaches to understanding the notion of “energy” as a work or a physical quantity are outdated. For example, R. Feynman noted that “today’s physics does not know what energy is.” Therefore, even now, some researchers believe that “by and large, the concept of energy… is artificial, because unlike matter, of which we can say that it exists, energy is the fruit of human thought.” In contrast to these ideas, the authors showed that energy, like matter, objectively exists in various forms (energy continuum), which differ in structure, and is able to perform different types of work, to determine the forms of interaction and movement of matter in various material systems (substances, material bodies and megamaterial systems). A new scientific foundation for systematization and quantitative evaluation of energy characteristics of chemical compounds was proposed. It is based on a comprehensive assessment of contribution of chemical compounds’ composition and chemical bond type in line with a chemical bond’s unified model and the “System of chemical bonds and compounds” (SCBC). As a result of using this basic scientific innovation, the symbiosis of Mendeleev’s periodic table of atoms (composition – property) and SCBC (composition - chemical bond and structure – property) was realized for the first time. The foundation was laid for creating a database on systemic digitalization and evaluation of energy stored in various chemicals (natural gas, coal, oil, peat, wood, etc.) and the most effective ways of extracting it from these.

Heavier group 13/15 multiple bond systems: Synthesis, Structure and Chemical Bond Activation

Heavier group 13/15 multiple bonds have been under investigation since the late 80s and to date, several examples have been published, which shows the obsoleteness of the so-called double bond...

Enhanced thermoelectric performance in Sb–Br codoped Bi2Se3 with complex electronic structure and chemical bond softening

A detailed description of the charge density difference of BiSb(Se0.92Br0.08)3.

Study of Barium Iodide-Hexamethylentetramin-Water System

Research relevance in this article is based on study of heterogeneous equilibria in ternary aqueous systems BaI2 — (CH2)6N4 — H2O, as synthesized complexes can be used as an antibacterial drug in veterinary medicine. Materials and research methods: heterogeneous equilibria were studied by the isothermal solubility method at 25 °С. Concentration limits of compounds existence and their solubility types have been established. Research objectives: to determine chemical bond types between the complexing agent and the ligand, as well as the general laws of thermal decomposition of synthesized compounds. Research results: the solubility isotherm of the BaI2 — (CH2)6N4 — H2O system has been studied and compiled. Conclusions: effect of anions on complexation and composition of resulting compounds were revealed.