Перегляд за Автор "Dyakonenko, Viktoriya"

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    Документ
    Crystal structure of bis[cis-diaquabis(phenanthroline) cobalt(II)] bis(citrato)germanate(IV) dinitrate
    (2021) Buchko, Olha; Dyakonenko, Viktoriya; Martsynko, Olena E.; Chebanenko, Olena A.; Марцинко, Олена Едуардівна; Марцинко, Елена Эдуардовна
    The asymmetric unit of the title compound, [Co(C12H8N2)2(H2O)2]2[Ge- (C6H5O7)2](NO3)2, features two complex [(C12H8N2)2(H2O)2Co]2+ cations, two NO3 anions as well as one centrosymmetric [(C6H5O7)2Ge]2 anion. Two HCit ligands (Cit = citrate, C6H4O7) each coordinate via three different oxygen atoms (hydroxylate, -carboxylate, -carboxylate) to the Ge atom, forming a slightly distorted octahedron. The coordination polyhedron of the Co atom is also octahedral, formed by coordination of four nitrogen atoms from two phenanthroline molecules and two water oxygen atoms. In the crystal, the cations and anions are linked by hydrogen bonds and form layers parallel to the bc plane. The structure exhibits disorder of the NO3 anion [disorder ratio 0.688 (9) to 0.312 (9)]. There are also highly disordered solvent molecules (presumably water and/or ethanol) in the crystal structure; explicit refinement of these molecules was not possible, and the content of the voids was instead taken into account using reverse Fourier transform methods [SQUEEZE procedure in PLATON; Spek (2015). Acta Cryst. C71, 9–18]. The given chemical formula and other crystal data do not take into account the unknown solvent molecule(s).
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    Документ
    Features of synthesis and structure of coordination polymer Ni(II) with 2-(4-bromophenoxy) acetohydrazide
    (Одеський національний університет імені І. І. Мечникова, 2024) Tsymbaliuk, Kyrylo; Martsynko, Olena E.; Finik, Оlena; Nesterkina, Mariia; Kravchenko, Iryna; Dyakonenko, Viktoriya; Shishkina, Svitlana; Марцинко, Олена Едуардівна
    Drugs having the hydrazide functional group are an important category within antituberculosis, antibacterial, antifungal, and antimicrobial pharmaceuticals. The coordination of hydrazides to biometal ions often leads to an increase in the biological activity of compounds, as well as an expansion of its spectrum. Thus, the study of complexation of new hydrazides with transition metals opens the way to the synthesis of more effective drug substances with a wide spectrum of pharmacological action.