Naslov
ML2 Metal complexes with bpa and imda ligands – In solution and solid-state

Autori
Aleks Logožar, Aleks ; Pantalon Juraj, Natalija ; Perić, Berislav ; Vianello, Robert ; Kirin, Srećko I.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International Conference Solutions in Chemistry 2022 : Book of Abstracts / Kassal, Petar ; Meštrović, Ernest ; Namjesnik, Danijel ; Ribić, Rosana ; Šekutor, Marina ; Tomišić, Vladislav ; Usenik, Andrea - Zagreb : Hrvatsko kemijsko društvo, 2022, 65-65

ISBN
978-953-8334-05-4

Skup
International Conference Solutions in Chemistry 2022

Mjesto i datum
Sveti Martin na Muri, Hrvatska, 08.11.2022. - 11.11.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
stereochemistry ; isomers

Sažetak
Bis-tridentate metal complexes of flexible ligands with [M(A-X-A)2] structure can form three different geometric isomers: mer, trans-fac and cis-fac. Many factors influence the stability of a certain isomer. Important factors to consider are electronic and steric properties of the coordinating ligand, type of central metal ion and counter-ion present, possibilities of forming non-covalent interactions and others. Understanding of the isomer preferences in hereby described systems would give us a head start in the development of new coordination compounds with desired form and properties. Derivatives of tridentate ligands bis(pyridine-2-ylmethyl)amine (bpa) and 2, 2’-iminodiacetamide (imda) were prepared in this work, as well as their corresponding complexes with different Zn(II), Cu(II), Ni(II) and Co(II) salts (Figure 1). Oxygen and sulfur, as well as -NH-, -NPh-, -PH- and -PPhfunctional groups were chosen to occupy a central position in the ligand structure. The stoichiometry and the stereochemistry of these complexes, together with possible conformations of their substituents, were studied using the DTF computational approach to determine their relative stability in solution. The systems in solution were studied by NMR and UV-Vis spectroscopy, while the solid-state structures of prepared complexes, characterized by single-crystal X-ray diffraction, gave us an insight of the isomerism in the solid-state. Experimental and computational results were discussed and preferences of some central donor atoms to form certain isomers of ML2 complexes were shown. One of our goals was to determine which factors lead to formation of cis-fac isomers, which could, in the case of nitrogen or phosphorous as central atoms, be used in the development of new type of selective catalysts.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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