СИНТЕЗ, СПЕКТРАЛЬНІ ХАРАКТРИСТИКИ ТА СТАБІЛЬНІСТЬ НОВИХ ГЕТЕРО-МЕТАЛІЧНИХ КОМПЛЕКСІВ Nd(III) ТА Co(II) З АМІНОПОЛІКАРБОНОВИМИ КИCЛОТАМИ

• Datum: 2022
• Hauptverfasser: Trunova , Elena, Mishchenko , Artem, Makotryk , Tamara
• Format: Artikel
• Sprache: English
• Veröffentlicht: V.I.Vernadsky Institute of General and Inorganic Chemistry 2022
• Online Zugang: https://ucj.org.ua/index.php/journal/article/view/408
• Назва журналу: Ukrainian Chemistry Journal

New heterometallic complexes of Nd(III) and Co(II) based on ethylenediaminetetraacetic and ethylenediaminedisuccinic acids have been synthesized. The complexes studied by electron absorption spectroscopy, IR-spectroscopy, and thermogravimetric analysis. The influence of a number of factors on the properties and structure of heteronuclear complexes is discussed. The spectral characteristics of homonuclear and heteronuclear complexes are compared. A theoretical analysis of the geometry of Co(II) and Nd(III) complexes with ethylenediaminesuccinic acid was carried out by the semi-empirical PM7 method. It has been shown that the f-d-complexes are of the folded type, in which the ligand-complexone realizes the maximum denticity to Nd(III), and the Co(II) coordination sphere is formed by bridging edta/edds carboxyl groups and intrasphere water molecules. The Co(II) coordination polyhedron corresponds to a distorted octahedron, and the Nd(III) coordination polyhedron corresponds to a one-capped square antiprism (C4v) with the coordination number Nd(III)=8. During study fixed that heterometallic complexes have the same structure in solutions and in the solid state.